initial sabre upgrade (needs lots of work - to wit: authentication, redo the browser interface, and rework event export/import)

28 files changed, 0 insertions, 5443 deletions

diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component.php
deleted file mode 100644
index 1c1d92444..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component.php
+++ /dev/null
@@ -1,405 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * VObject Component
- *
- * This class represents a VCALENDAR/VCARD component. A component is for example
- * VEVENT, VTODO and also VCALENDAR. It starts with BEGIN:COMPONENTNAME and
- * ends with END:COMPONENTNAME
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Component extends Node {
-
-    /**
-     * Name, for example VEVENT
-     *
-     * @var string
-     */
-    public $name;
-
-    /**
-     * Children properties and components
-     *
-     * @var array
-     */
-    public $children = array();
-
-    /**
-     * If components are added to this map, they will be automatically mapped
-     * to their respective classes, if parsed by the reader or constructed with
-     * the 'create' method.
-     *
-     * @var array
-     */
-    static public $classMap = array(
-        'VALARM'        => 'Sabre\\VObject\\Component\\VAlarm',
-        'VCALENDAR'     => 'Sabre\\VObject\\Component\\VCalendar',
-        'VCARD'         => 'Sabre\\VObject\\Component\\VCard',
-        'VEVENT'        => 'Sabre\\VObject\\Component\\VEvent',
-        'VJOURNAL'      => 'Sabre\\VObject\\Component\\VJournal',
-        'VTODO'         => 'Sabre\\VObject\\Component\\VTodo',
-        'VFREEBUSY'     => 'Sabre\\VObject\\Component\\VFreeBusy',
-    );
-
-    /**
-     * Creates the new component by name, but in addition will also see if
-     * there's a class mapped to the property name.
-     *
-     * @param string $name
-     * @param string $value
-     * @return Component
-     */
-    static public function create($name, $value = null) {
-
-        $name = strtoupper($name);
-
-        if (isset(self::$classMap[$name])) {
-            return new self::$classMap[$name]($name, $value);
-        } else {
-            return new self($name, $value);
-        }
-
-    }
-
-    /**
-     * Creates a new component.
-     *
-     * By default this object will iterate over its own children, but this can
-     * be overridden with the iterator argument
-     *
-     * @param string $name
-     * @param ElementList $iterator
-     */
-    public function __construct($name, ElementList $iterator = null) {
-
-        $this->name = strtoupper($name);
-        if (!is_null($iterator)) $this->iterator = $iterator;
-
-    }
-
-    /**
-     * Turns the object back into a serialized blob.
-     *
-     * @return string
-     */
-    public function serialize() {
-
-        $str = "BEGIN:" . $this->name . "\r\n";
-
-        /**
-         * Gives a component a 'score' for sorting purposes.
-         *
-         * This is solely used by the childrenSort method.
-         *
-         * A higher score means the item will be lower in the list.
-         * To avoid score collisions, each "score category" has a reasonable
-         * space to accomodate elements. The $key is added to the $score to
-         * preserve the original relative order of elements.
-         *
-         * @param int $key
-         * @param array $array
-         * @return int
-         */
-        $sortScore = function($key, $array) {
-
-            if ($array[$key] instanceof Component) {
-
-                // We want to encode VTIMEZONE first, this is a personal
-                // preference.
-                if ($array[$key]->name === 'VTIMEZONE') {
-                    $score=300000000;
-                    return $score+$key;
-                } else {
-                    $score=400000000;
-                    return $score+$key;
-                }
-            } else {
-                // Properties get encoded first
-                // VCARD version 4.0 wants the VERSION property to appear first
-                if ($array[$key] instanceof Property) {
-                    if ($array[$key]->name === 'VERSION') {
-                        $score=100000000;
-                        return $score+$key;
-                    } else {
-                        // All other properties
-                        $score=200000000;
-                        return $score+$key;
-                    }
-                }
-            }
-
-        };
-
-        $tmp = $this->children;
-        uksort($this->children, function($a, $b) use ($sortScore, $tmp) {
-
-            $sA = $sortScore($a, $tmp);
-            $sB = $sortScore($b, $tmp);
-
-            if ($sA === $sB) return 0;
-
-            return ($sA < $sB) ? -1 : 1;
-
-        });
-
-        foreach($this->children as $child) $str.=$child->serialize();
-        $str.= "END:" . $this->name . "\r\n";
-
-        return $str;
-
-    }
-
-    /**
-     * Adds a new component or element
-     *
-     * You can call this method with the following syntaxes:
-     *
-     * add(Node $node)
-     * add(string $name, $value, array $parameters = array())
-     *
-     * The first version adds an Element
-     * The second adds a property as a string.
-     *
-     * @param mixed $item
-     * @param mixed $itemValue
-     * @return void
-     */
-    public function add($item, $itemValue = null, array $parameters = array()) {
-
-        if ($item instanceof Node) {
-            if (!is_null($itemValue)) {
-                throw new \InvalidArgumentException('The second argument must not be specified, when passing a VObject Node');
-            }
-            $item->parent = $this;
-            $this->children[] = $item;
-        } elseif(is_string($item)) {
-
-            $item = Property::create($item,$itemValue, $parameters);
-            $item->parent = $this;
-            $this->children[] = $item;
-
-        } else {
-
-            throw new \InvalidArgumentException('The first argument must either be a \\Sabre\\VObject\\Node or a string');
-
-        }
-
-    }
-
-    /**
-     * Returns an iterable list of children
-     *
-     * @return ElementList
-     */
-    public function children() {
-
-        return new ElementList($this->children);
-
-    }
-
-    /**
-     * Returns an array with elements that match the specified name.
-     *
-     * This function is also aware of MIME-Directory groups (as they appear in
-     * vcards). This means that if a property is grouped as "HOME.EMAIL", it
-     * will also be returned when searching for just "EMAIL". If you want to
-     * search for a property in a specific group, you can select on the entire
-     * string ("HOME.EMAIL"). If you want to search on a specific property that
-     * has not been assigned a group, specify ".EMAIL".
-     *
-     * Keys are retained from the 'children' array, which may be confusing in
-     * certain cases.
-     *
-     * @param string $name
-     * @return array
-     */
-    public function select($name) {
-
-        $group = null;
-        $name = strtoupper($name);
-        if (strpos($name,'.')!==false) {
-            list($group,$name) = explode('.', $name, 2);
-        }
-
-        $result = array();
-        foreach($this->children as $key=>$child) {
-
-            if (
-                strtoupper($child->name) === $name &&
-                (is_null($group) || ( $child instanceof Property && strtoupper($child->group) === $group))
-            ) {
-
-                $result[$key] = $child;
-
-            }
-        }
-
-        reset($result);
-        return $result;
-
-    }
-
-    /**
-     * This method only returns a list of sub-components. Properties are
-     * ignored.
-     *
-     * @return array
-     */
-    public function getComponents() {
-
-        $result = array();
-        foreach($this->children as $child) {
-            if ($child instanceof Component) {
-                $result[] = $child;
-            }
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Validates the node for correctness.
-     *
-     * The following options are supported:
-     *   - Node::REPAIR - If something is broken, and automatic repair may
-     *                    be attempted.
-     *
-     * An array is returned with warnings.
-     *
-     * Every item in the array has the following properties:
-     *    * level - (number between 1 and 3 with severity information)
-     *    * message - (human readable message)
-     *    * node - (reference to the offending node)
-     *
-     * @param int $options
-     * @return array
-     */
-    public function validate($options = 0) {
-
-        $result = array();
-        foreach($this->children as $child) {
-            $result = array_merge($result, $child->validate($options));
-        }
-        return $result;
-
-    }
-
-    /* Magic property accessors {{{ */
-
-    /**
-     * Using 'get' you will either get a property or component,
-     *
-     * If there were no child-elements found with the specified name,
-     * null is returned.
-     *
-     * @param string $name
-     * @return Property
-     */
-    public function __get($name) {
-
-        $matches = $this->select($name);
-        if (count($matches)===0) {
-            return null;
-        } else {
-            $firstMatch = current($matches);
-            /** @var $firstMatch Property */
-            $firstMatch->setIterator(new ElementList(array_values($matches)));
-            return $firstMatch;
-        }
-
-    }
-
-    /**
-     * This method checks if a sub-element with the specified name exists.
-     *
-     * @param string $name
-     * @return bool
-     */
-    public function __isset($name) {
-
-        $matches = $this->select($name);
-        return count($matches)>0;
-
-    }
-
-    /**
-     * Using the setter method you can add properties or subcomponents
-     *
-     * You can either pass a Component, Property
-     * object, or a string to automatically create a Property.
-     *
-     * If the item already exists, it will be removed. If you want to add
-     * a new item with the same name, always use the add() method.
-     *
-     * @param string $name
-     * @param mixed $value
-     * @return void
-     */
-    public function __set($name, $value) {
-
-        $matches = $this->select($name);
-        $overWrite = count($matches)?key($matches):null;
-
-        if ($value instanceof Component || $value instanceof Property) {
-            $value->parent = $this;
-            if (!is_null($overWrite)) {
-                $this->children[$overWrite] = $value;
-            } else {
-                $this->children[] = $value;
-            }
-        } elseif (is_scalar($value)) {
-            $property = Property::create($name,$value);
-            $property->parent = $this;
-            if (!is_null($overWrite)) {
-                $this->children[$overWrite] = $property;
-            } else {
-                $this->children[] = $property;
-            }
-        } else {
-            throw new \InvalidArgumentException('You must pass a \\Sabre\\VObject\\Component, \\Sabre\\VObject\\Property or scalar type');
-        }
-
-    }
-
-    /**
-     * Removes all properties and components within this component.
-     *
-     * @param string $name
-     * @return void
-     */
-    public function __unset($name) {
-
-        $matches = $this->select($name);
-        foreach($matches as $k=>$child) {
-
-            unset($this->children[$k]);
-            $child->parent = null;
-
-        }
-
-    }
-
-    /* }}} */
-
-    /**
-     * This method is automatically called when the object is cloned.
-     * Specifically, this will ensure all child elements are also cloned.
-     *
-     * @return void
-     */
-    public function __clone() {
-
-        foreach($this->children as $key=>$child) {
-            $this->children[$key] = clone $child;
-            $this->children[$key]->parent = $this;
-        }
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VAlarm.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VAlarm.php
deleted file mode 100644
index 2f86c44fd..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VAlarm.php
+++ /dev/null
@@ -1,108 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-use Sabre\VObject;
-
-/**
- * VAlarm component
- *
- * This component contains some additional functionality specific for VALARMs.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VAlarm extends VObject\Component {
-
-    /**
-     * Returns a DateTime object when this alarm is going to trigger.
-     *
-     * This ignores repeated alarm, only the first trigger is returned.
-     *
-     * @return DateTime
-     */
-    public function getEffectiveTriggerTime() {
-
-        $trigger = $this->TRIGGER;
-        if(!isset($trigger['VALUE']) || strtoupper($trigger['VALUE']) === 'DURATION') {
-            $triggerDuration = VObject\DateTimeParser::parseDuration($this->TRIGGER);
-            $related = (isset($trigger['RELATED']) && strtoupper($trigger['RELATED']) == 'END') ? 'END' : 'START';
-
-            $parentComponent = $this->parent;
-            if ($related === 'START') {
-
-                if ($parentComponent->name === 'VTODO') {
-                    $propName = 'DUE';
-                } else {
-                    $propName = 'DTSTART';
-                }
-
-                $effectiveTrigger = clone $parentComponent->$propName->getDateTime();
-                $effectiveTrigger->add($triggerDuration);
-            } else {
-                if ($parentComponent->name === 'VTODO') {
-                    $endProp = 'DUE';
-                } elseif ($parentComponent->name === 'VEVENT') {
-                    $endProp = 'DTEND';
-                } else {
-                    throw new \LogicException('time-range filters on VALARM components are only supported when they are a child of VTODO or VEVENT');
-                }
-
-                if (isset($parentComponent->$endProp)) {
-                    $effectiveTrigger = clone $parentComponent->$endProp->getDateTime();
-                    $effectiveTrigger->add($triggerDuration);
-                } elseif (isset($parentComponent->DURATION)) {
-                    $effectiveTrigger = clone $parentComponent->DTSTART->getDateTime();
-                    $duration = VObject\DateTimeParser::parseDuration($parentComponent->DURATION);
-                    $effectiveTrigger->add($duration);
-                    $effectiveTrigger->add($triggerDuration);
-                } else {
-                    $effectiveTrigger = clone $parentComponent->DTSTART->getDateTime();
-                    $effectiveTrigger->add($triggerDuration);
-                }
-            }
-        } else {
-            $effectiveTrigger = $trigger->getDateTime();
-        }
-        return $effectiveTrigger;
-
-    }
-
-    /**
-     * Returns true or false depending on if the event falls in the specified
-     * time-range. This is used for filtering purposes.
-     *
-     * The rules used to determine if an event falls within the specified
-     * time-range is based on the CalDAV specification.
-     *
-     * @param \DateTime $start
-     * @param \DateTime $end
-     * @return bool
-     */
-    public function isInTimeRange(\DateTime $start, \DateTime $end) {
-
-        $effectiveTrigger = $this->getEffectiveTriggerTime();
-
-        if (isset($this->DURATION)) {
-            $duration = VObject\DateTimeParser::parseDuration($this->DURATION);
-            $repeat = (string)$this->repeat;
-            if (!$repeat) {
-                $repeat = 1;
-            }
-
-            $period = new \DatePeriod($effectiveTrigger, $duration, (int)$repeat);
-
-            foreach($period as $occurrence) {
-
-                if ($start <= $occurrence && $end > $occurrence) {
-                    return true;
-                }
-            }
-            return false;
-        } else {
-            return ($start <= $effectiveTrigger && $end > $effectiveTrigger);
-        }
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCalendar.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCalendar.php
deleted file mode 100644
index 9de67982e..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCalendar.php
+++ /dev/null
@@ -1,244 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-
-use Sabre\VObject;
-
-/**
- * The VCalendar component
- *
- * This component adds functionality to a component, specific for a VCALENDAR.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VCalendar extends VObject\Document {
-
-    static $defaultName = 'VCALENDAR';
-
-    /**
-     * Returns a list of all 'base components'. For instance, if an Event has
-     * a recurrence rule, and one instance is overridden, the overridden event
-     * will have the same UID, but will be excluded from this list.
-     *
-     * VTIMEZONE components will always be excluded.
-     *
-     * @param string $componentName filter by component name
-     * @return array
-     */
-    public function getBaseComponents($componentName = null) {
-
-        $components = array();
-        foreach($this->children as $component) {
-
-            if (!$component instanceof VObject\Component)
-                continue;
-
-            if (isset($component->{'RECURRENCE-ID'}))
-                continue;
-
-            if ($componentName && $component->name !== strtoupper($componentName))
-                continue;
-
-            if ($component->name === 'VTIMEZONE')
-                continue;
-
-            $components[] = $component;
-
-        }
-
-        return $components;
-
-    }
-
-    /**
-     * If this calendar object, has events with recurrence rules, this method
-     * can be used to expand the event into multiple sub-events.
-     *
-     * Each event will be stripped from it's recurrence information, and only
-     * the instances of the event in the specified timerange will be left
-     * alone.
-     *
-     * In addition, this method will cause timezone information to be stripped,
-     * and normalized to UTC.
-     *
-     * This method will alter the VCalendar. This cannot be reversed.
-     *
-     * This functionality is specifically used by the CalDAV standard. It is
-     * possible for clients to request expand events, if they are rather simple
-     * clients and do not have the possibility to calculate recurrences.
-     *
-     * @param DateTime $start
-     * @param DateTime $end
-     * @return void
-     */
-    public function expand(\DateTime $start, \DateTime $end) {
-
-        $newEvents = array();
-
-        foreach($this->select('VEVENT') as $key=>$vevent) {
-
-            if (isset($vevent->{'RECURRENCE-ID'})) {
-                unset($this->children[$key]);
-                continue;
-            }
-
-
-            if (!$vevent->rrule) {
-                unset($this->children[$key]);
-                if ($vevent->isInTimeRange($start, $end)) {
-                    $newEvents[] = $vevent;
-                }
-                continue;
-            }
-
-            $uid = (string)$vevent->uid;
-            if (!$uid) {
-                throw new \LogicException('Event did not have a UID!');
-            }
-
-            $it = new VObject\RecurrenceIterator($this, $vevent->uid);
-            $it->fastForward($start);
-
-            while($it->valid() && $it->getDTStart() < $end) {
-
-                if ($it->getDTEnd() > $start) {
-
-                    $newEvents[] = $it->getEventObject();
-
-                }
-                $it->next();
-
-            }
-            unset($this->children[$key]);
-
-        }
-
-        foreach($newEvents as $newEvent) {
-
-            foreach($newEvent->children as $child) {
-                if ($child instanceof VObject\Property\DateTime &&
-                    $child->getDateType() == VObject\Property\DateTime::LOCALTZ) {
-                        $child->setDateTime($child->getDateTime(),VObject\Property\DateTime::UTC);
-                    }
-            }
-
-            $this->add($newEvent);
-
-        }
-
-        // Removing all VTIMEZONE components
-        unset($this->VTIMEZONE);
-
-    }
-
-    /**
-     * Validates the node for correctness.
-     * An array is returned with warnings.
-     *
-     * Every item in the array has the following properties:
-     *    * level - (number between 1 and 3 with severity information)
-     *    * message - (human readable message)
-     *    * node - (reference to the offending node)
-     *
-     * @return array
-     */
-    /*
-    public function validate() {
-
-        $warnings = array();
-
-        $version = $this->select('VERSION');
-        if (count($version)!==1) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'The VERSION property must appear in the VCALENDAR component exactly 1 time',
-                'node' => $this,
-            );
-        } else {
-            if ((string)$this->VERSION !== '2.0') {
-                $warnings[] = array(
-                    'level' => 1,
-                    'message' => 'Only iCalendar version 2.0 as defined in rfc5545 is supported.',
-                    'node' => $this,
-                );
-            }
-        }
-        $version = $this->select('PRODID');
-        if (count($version)!==1) {
-            $warnings[] = array(
-                'level' => 2,
-                'message' => 'The PRODID property must appear in the VCALENDAR component exactly 1 time',
-                'node' => $this,
-            );
-        }
-        if (count($this->CALSCALE) > 1) {
-            $warnings[] = array(
-                'level' => 2,
-                'message' => 'The CALSCALE property must not be specified more than once.',
-                'node' => $this,
-            );
-        }
-        if (count($this->METHOD) > 1) {
-            $warnings[] = array(
-                'level' => 2,
-                'message' => 'The METHOD property must not be specified more than once.',
-                'node' => $this,
-            );
-        }
-
-        $allowedComponents = array(
-            'VEVENT',
-            'VTODO',
-            'VJOURNAL',
-            'VFREEBUSY',
-            'VTIMEZONE',
-        );
-        $allowedProperties = array(
-            'PRODID',
-            'VERSION',
-            'CALSCALE',
-            'METHOD',
-        );
-        $componentsFound = 0;
-        foreach($this->children as $child) {
-            if($child instanceof Component) {
-                $componentsFound++;
-                if (!in_array($child->name, $allowedComponents)) {
-                    $warnings[] = array(
-                        'level' => 1,
-                        'message' => 'The ' . $child->name . " component is not allowed in the VCALENDAR component",
-                        'node' => $this,
-                    );
-                }
-            }
-            if ($child instanceof Property) {
-                if (!in_array($child->name, $allowedProperties)) {
-                    $warnings[] = array(
-                        'level' => 2,
-                        'message' => 'The ' . $child->name . " property is not allowed in the VCALENDAR component",
-                        'node' => $this,
-                    );
-                }
-            }
-        }
-
-        if ($componentsFound===0) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'An iCalendar object must have at least 1 component.',
-                'node' => $this,
-            );
-        }
-
-        return array_merge(
-            $warnings,
-            parent::validate()
-        );
-
-    }
-     */
-
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCard.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCard.php
deleted file mode 100644
index 0fc8b7020..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VCard.php
+++ /dev/null
@@ -1,107 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-
-use Sabre\VObject;
-
-/**
- * The VCard component
- *
- * This component represents the BEGIN:VCARD and END:VCARD found in every
- * vcard.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VCard extends VObject\Component {
-
-    static $defaultName = 'VCARD';
-
-    /**
-     * VCards with version 2.1, 3.0 and 4.0 are found.
-     *
-     * If the VCARD doesn't know its version, 4.0 is assumed.
-     */
-    const DEFAULT_VERSION = '4.0';
-
-    /**
-     * Validates the node for correctness.
-     *
-     * The following options are supported:
-     *   - Node::REPAIR - If something is broken, and automatic repair may
-     *                    be attempted.
-     *
-     * An array is returned with warnings.
-     *
-     * Every item in the array has the following properties:
-     *    * level - (number between 1 and 3 with severity information)
-     *    * message - (human readable message)
-     *    * node - (reference to the offending node)
-     *
-     * @param int $options
-     * @return array
-     */
-    public function validate($options = 0) {
-
-        $warnings = array();
-
-        $version = $this->select('VERSION');
-        if (count($version)!==1) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'The VERSION property must appear in the VCARD component exactly 1 time',
-                'node' => $this,
-            );
-            if ($options & self::REPAIR) {
-                $this->VERSION = self::DEFAULT_VERSION;
-            }
-        } else {
-            $version = (string)$this->VERSION;
-            if ($version!=='2.1' && $version!=='3.0' && $version!=='4.0') {
-                $warnings[] = array(
-                    'level' => 1,
-                    'message' => 'Only vcard version 4.0 (RFC6350), version 3.0 (RFC2426) or version 2.1 (icm-vcard-2.1) are supported.',
-                    'node' => $this,
-                );
-                if ($options & self::REPAIR) {
-                    $this->VERSION = '4.0';
-                }
-            }
-
-        }
-        $fn = $this->select('FN');
-        if (count($fn)!==1) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'The FN property must appear in the VCARD component exactly 1 time',
-                'node' => $this,
-            );
-            if (($options & self::REPAIR) && count($fn) === 0) {
-                // We're going to try to see if we can use the contents of the
-                // N property.
-                if (isset($this->N)) {
-                    $value = explode(';', (string)$this->N);
-                    if (isset($value[1]) && $value[1]) {
-                        $this->FN = $value[1] . ' ' . $value[0];
-                    } else {
-                        $this->FN = $value[0];
-                    }
-
-                // Otherwise, the ORG property may work
-                } elseif (isset($this->ORG)) {
-                    $this->FN = (string)$this->ORG;
-                }
-
-            }
-        }
-
-        return array_merge(
-            parent::validate($options),
-            $warnings
-        );
-
-    }
-
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VEvent.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VEvent.php
deleted file mode 100644
index 2375c5317..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VEvent.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-use Sabre\VObject;
-
-/**
- * VEvent component
- *
- * This component contains some additional functionality specific for VEVENT's.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VEvent extends VObject\Component {
-
-    /**
-     * Returns true or false depending on if the event falls in the specified
-     * time-range. This is used for filtering purposes.
-     *
-     * The rules used to determine if an event falls within the specified
-     * time-range is based on the CalDAV specification.
-     *
-     * @param \DateTime $start
-     * @param \DateTime $end
-     * @return bool
-     */
-    public function isInTimeRange(\DateTime $start, \DateTime $end) {
-
-        if ($this->RRULE) {
-            $it = new VObject\RecurrenceIterator($this);
-            $it->fastForward($start);
-
-            // We fast-forwarded to a spot where the end-time of the
-            // recurrence instance exceeded the start of the requested
-            // time-range.
-            //
-            // If the starttime of the recurrence did not exceed the
-            // end of the time range as well, we have a match.
-            return ($it->getDTStart() < $end && $it->getDTEnd() > $start);
-
-        }
-
-        $effectiveStart = $this->DTSTART->getDateTime();
-        if (isset($this->DTEND)) {
-
-            // The DTEND property is considered non inclusive. So for a 3 day
-            // event in july, dtstart and dtend would have to be July 1st and
-            // July 4th respectively.
-            //
-            // See:
-            // http://tools.ietf.org/html/rfc5545#page-54
-            $effectiveEnd = $this->DTEND->getDateTime();
-
-        } elseif (isset($this->DURATION)) {
-            $effectiveEnd = clone $effectiveStart;
-            $effectiveEnd->add( VObject\DateTimeParser::parseDuration($this->DURATION) );
-        } elseif ($this->DTSTART->getDateType() == VObject\Property\DateTime::DATE) {
-            $effectiveEnd = clone $effectiveStart;
-            $effectiveEnd->modify('+1 day');
-        } else {
-            $effectiveEnd = clone $effectiveStart;
-        }
-        return (
-            ($start <= $effectiveEnd) && ($end > $effectiveStart)
-        );
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VFreeBusy.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VFreeBusy.php
deleted file mode 100644
index 7afe9fdb3..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VFreeBusy.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-
-use Sabre\VObject;
-
-/**
- * The VFreeBusy component
- *
- * This component adds functionality to a component, specific for VFREEBUSY
- * components.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VFreeBusy extends VObject\Component {
-
-    /**
-     * Checks based on the contained FREEBUSY information, if a timeslot is
-     * available.
-     *
-     * @param DateTime $start
-     * @param Datetime $end
-     * @return bool
-     */
-    public function isFree(\DateTime $start, \Datetime $end) {
-
-        foreach($this->select('FREEBUSY') as $freebusy) {
-
-            // We are only interested in FBTYPE=BUSY (the default),
-            // FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
-            if (isset($freebusy['FBTYPE']) && strtoupper(substr((string)$freebusy['FBTYPE'],0,4))!=='BUSY') {
-                continue;
-            }
-
-            // The freebusy component can hold more than 1 value, separated by
-            // commas.
-            $periods = explode(',', (string)$freebusy);
-
-            foreach($periods as $period) {
-                // Every period is formatted as [start]/[end]. The start is an
-                // absolute UTC time, the end may be an absolute UTC time, or
-                // duration (relative) value.
-                list($busyStart, $busyEnd) = explode('/', $period);
-
-                $busyStart = VObject\DateTimeParser::parse($busyStart);
-                $busyEnd = VObject\DateTimeParser::parse($busyEnd);
-                if ($busyEnd instanceof \DateInterval) {
-                    $tmp = clone $busyStart;
-                    $tmp->add($busyEnd);
-                    $busyEnd = $tmp;
-                }
-
-                if($start < $busyEnd && $end > $busyStart) {
-                    return false;
-                }
-
-            }
-
-        }
-
-        return true;
-
-    }
-
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VJournal.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VJournal.php
deleted file mode 100644
index 232887879..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VJournal.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-
-use Sabre\VObject;
-
-/**
- * VJournal component
- *
- * This component contains some additional functionality specific for VJOURNALs.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VJournal extends VObject\Component {
-
-    /**
-     * Returns true or false depending on if the event falls in the specified
-     * time-range. This is used for filtering purposes.
-     *
-     * The rules used to determine if an event falls within the specified
-     * time-range is based on the CalDAV specification.
-     *
-     * @param DateTime $start
-     * @param DateTime $end
-     * @return bool
-     */
-    public function isInTimeRange(\DateTime $start, \DateTime $end) {
-
-        $dtstart = isset($this->DTSTART)?$this->DTSTART->getDateTime():null;
-        if ($dtstart) {
-            $effectiveEnd = clone $dtstart;
-            if ($this->DTSTART->getDateType() == VObject\Property\DateTime::DATE) {
-                $effectiveEnd->modify('+1 day');
-            }
-
-            return ($start <= $effectiveEnd && $end > $dtstart);
-
-        }
-        return false;
-
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VTodo.php b/vendor/sabre/vobject/lib/Sabre/VObject/Component/VTodo.php
deleted file mode 100644
index b1579cf74..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Component/VTodo.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Component;
-
-use Sabre\VObject;
-
-/**
- * VTodo component
- *
- * This component contains some additional functionality specific for VTODOs.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VTodo extends VObject\Component {
-
-    /**
-     * Returns true or false depending on if the event falls in the specified
-     * time-range. This is used for filtering purposes.
-     *
-     * The rules used to determine if an event falls within the specified
-     * time-range is based on the CalDAV specification.
-     *
-     * @param DateTime $start
-     * @param DateTime $end
-     * @return bool
-     */
-    public function isInTimeRange(\DateTime $start, \DateTime $end) {
-
-        $dtstart = isset($this->DTSTART)?$this->DTSTART->getDateTime():null;
-        $duration = isset($this->DURATION)?VObject\DateTimeParser::parseDuration($this->DURATION):null;
-        $due = isset($this->DUE)?$this->DUE->getDateTime():null;
-        $completed = isset($this->COMPLETED)?$this->COMPLETED->getDateTime():null;
-        $created = isset($this->CREATED)?$this->CREATED->getDateTime():null;
-
-        if ($dtstart) {
-            if ($duration) {
-                $effectiveEnd = clone $dtstart;
-                $effectiveEnd->add($duration);
-                return $start <= $effectiveEnd && $end > $dtstart;
-            } elseif ($due) {
-                return
-                    ($start < $due || $start <= $dtstart) &&
-                    ($end > $dtstart || $end >= $due);
-            } else {
-                return $start <= $dtstart && $end > $dtstart;
-            }
-        }
-        if ($due) {
-            return ($start < $due && $end >= $due);
-        }
-        if ($completed && $created) {
-            return
-                ($start <= $created || $start <= $completed) &&
-                ($end >= $created || $end >= $completed);
-        }
-        if ($completed) {
-            return ($start <= $completed && $end >= $completed);
-        }
-        if ($created) {
-            return ($end > $created);
-        }
-        return true;
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/DateTimeParser.php b/vendor/sabre/vobject/lib/Sabre/VObject/DateTimeParser.php
deleted file mode 100644
index 03600506d..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/DateTimeParser.php
+++ /dev/null
@@ -1,181 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * DateTimeParser
- *
- * This class is responsible for parsing the several different date and time
- * formats iCalendar and vCards have.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class DateTimeParser {
-
-    /**
-     * Parses an iCalendar (rfc5545) formatted datetime and returns a DateTime object
-     *
-     * Specifying a reference timezone is optional. It will only be used
-     * if the non-UTC format is used. The argument is used as a reference, the
-     * returned DateTime object will still be in the UTC timezone.
-     *
-     * @param string $dt
-     * @param DateTimeZone $tz
-     * @return DateTime
-     */
-    static public function parseDateTime($dt,\DateTimeZone $tz = null) {
-
-        // Format is YYYYMMDD + "T" + hhmmss
-        $result = preg_match('/^([1-4][0-9]{3})([0-1][0-9])([0-3][0-9])T([0-2][0-9])([0-5][0-9])([0-5][0-9])([Z]?)$/',$dt,$matches);
-
-        if (!$result) {
-            throw new \LogicException('The supplied iCalendar datetime value is incorrect: ' . $dt);
-        }
-
-        if ($matches[7]==='Z' || is_null($tz)) {
-            $tz = new \DateTimeZone('UTC');
-        }
-        $date = new \DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3] . ' ' . $matches[4] . ':' . $matches[5] .':' . $matches[6], $tz);
-
-        // Still resetting the timezone, to normalize everything to UTC
-        $date->setTimeZone(new \DateTimeZone('UTC'));
-        return $date;
-
-    }
-
-    /**
-     * Parses an iCalendar (rfc5545) formatted date and returns a DateTime object
-     *
-     * @param string $date
-     * @return DateTime
-     */
-    static public function parseDate($date) {
-
-        // Format is YYYYMMDD
-        $result = preg_match('/^([1-4][0-9]{3})([0-1][0-9])([0-3][0-9])$/',$date,$matches);
-
-        if (!$result) {
-            throw new \LogicException('The supplied iCalendar date value is incorrect: ' . $date);
-        }
-
-        $date = new \DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3], new \DateTimeZone('UTC'));
-        return $date;
-
-    }
-
-    /**
-     * Parses an iCalendar (RFC5545) formatted duration value.
-     *
-     * This method will either return a DateTimeInterval object, or a string
-     * suitable for strtotime or DateTime::modify.
-     *
-     * @param string $duration
-     * @param bool $asString
-     * @return DateInterval|string
-     */
-    static public function parseDuration($duration, $asString = false) {
-
-        $result = preg_match('/^(?P<plusminus>\+|-)?P((?P<week>\d+)W)?((?P<day>\d+)D)?(T((?P<hour>\d+)H)?((?P<minute>\d+)M)?((?P<second>\d+)S)?)?$/', $duration, $matches);
-        if (!$result) {
-            throw new \LogicException('The supplied iCalendar duration value is incorrect: ' . $duration);
-        }
-
-        if (!$asString) {
-            $invert = false;
-            if ($matches['plusminus']==='-') {
-                $invert = true;
-            }
-
-
-            $parts = array(
-                'week',
-                'day',
-                'hour',
-                'minute',
-                'second',
-            );
-            foreach($parts as $part) {
-                $matches[$part] = isset($matches[$part])&&$matches[$part]?(int)$matches[$part]:0;
-            }
-
-
-            // We need to re-construct the $duration string, because weeks and
-            // days are not supported by DateInterval in the same string.
-            $duration = 'P';
-            $days = $matches['day'];
-            if ($matches['week']) {
-                $days+=$matches['week']*7;
-            }
-            if ($days)
-                $duration.=$days . 'D';
-
-            if ($matches['minute'] || $matches['second'] || $matches['hour']) {
-                $duration.='T';
-
-                if ($matches['hour'])
-                    $duration.=$matches['hour'].'H';
-
-                if ($matches['minute'])
-                    $duration.=$matches['minute'].'M';
-
-                if ($matches['second'])
-                    $duration.=$matches['second'].'S';
-
-            }
-
-            if ($duration==='P') {
-                $duration = 'PT0S';
-            }
-            $iv = new \DateInterval($duration);
-            if ($invert) $iv->invert = true;
-
-            return $iv;
-
-        }
-
-
-
-        $parts = array(
-            'week',
-            'day',
-            'hour',
-            'minute',
-            'second',
-        );
-
-        $newDur = '';
-        foreach($parts as $part) {
-            if (isset($matches[$part]) && $matches[$part]) {
-                $newDur.=' '.$matches[$part] . ' ' . $part . 's';
-            }
-        }
-
-        $newDur = ($matches['plusminus']==='-'?'-':'+') . trim($newDur);
-        if ($newDur === '+') { $newDur = '+0 seconds'; };
-        return $newDur;
-
-    }
-
-    /**
-     * Parses either a Date or DateTime, or Duration value.
-     *
-     * @param string $date
-     * @param DateTimeZone|string $referenceTZ
-     * @return DateTime|DateInterval
-     */
-    static public function parse($date, $referenceTZ = null) {
-
-        if ($date[0]==='P' || ($date[0]==='-' && $date[1]==='P')) {
-            return self::parseDuration($date);
-        } elseif (strlen($date)===8) {
-            return self::parseDate($date);
-        } else {
-            return self::parseDateTime($date, $referenceTZ);
-        }
-
-    }
-
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Document.php b/vendor/sabre/vobject/lib/Sabre/VObject/Document.php
deleted file mode 100644
index 50a662ee9..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Document.php
+++ /dev/null
@@ -1,109 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * Document
- *
- * A document is just like a component, except that it's also the top level
- * element.
- *
- * Both a VCALENDAR and a VCARD are considered documents.
- *
- * This class also provides a registry for document types.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH. All rights reserved.
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-abstract class Document extends Component {
-
-    /**
-     * The default name for this component.
-     *
-     * This should be 'VCALENDAR' or 'VCARD'.
-     *
-     * @var string
-     */
-    static $defaultName;
-
-    /**
-     * Creates a new document.
-     *
-     * We're changing the default behavior slightly here. First, we don't want
-     * to have to specify a name (we already know it), and we want to allow
-     * children to be specified in the first argument.
-     *
-     * But, the default behavior also works.
-     *
-     * So the two sigs:
-     *
-     * new Document(array $children = array());
-     * new Document(string $name, array $children = array())
-     *
-     * @return void
-     */
-    public function __construct() {
-
-        $args = func_get_args();
-        if (count($args)===0 || is_array($args[0])) {
-            array_unshift($args, static::$defaultName);
-            call_user_func_array(array('parent', '__construct'), $args);
-        } else {
-            call_user_func_array(array('parent', '__construct'), $args);
-        }
-
-    }
-
-    /**
-     * Creates a new component
-     *
-     * This method automatically searches for the correct component class, based
-     * on its name.
-     *
-     * You can specify the children either in key=>value syntax, in which case
-     * properties will automatically be created, or you can just pass a list of
-     * Component and Property object.
-     *
-     * @param string $name
-     * @param array $children
-     * @return Component
-     */
-    public function createComponent($name, array $children = array()) {
-
-        $component = Component::create($name);
-        foreach($children as $k=>$v) {
-
-            if ($v instanceof Node) {
-                $component->add($v);
-            } else {
-                $component->add($k, $v);
-            }
-
-        }
-        return $component;
-
-    }
-
-    /**
-     * Factory method for creating new properties
-     *
-     * This method automatically searches for the correct property class, based
-     * on its name.
-     *
-     * You can specify the parameters either in key=>value syntax, in which case
-     * parameters will automatically be created, or you can just pass a list of
-     * Parameter objects.
-     *
-     * @param string $name
-     * @param mixed $value
-     * @param array $parameters
-     * @return Property
-     */
-    public function createProperty($name, $value = null, array $parameters = array()) {
-
-        return Property::create($name, $value, $parameters);
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/ElementList.php b/vendor/sabre/vobject/lib/Sabre/VObject/ElementList.php
deleted file mode 100644
index 1c203708e..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/ElementList.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * VObject ElementList
- *
- * This class represents a list of elements. Lists are the result of queries,
- * such as doing $vcalendar->vevent where there's multiple VEVENT objects.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class ElementList implements \Iterator, \Countable, \ArrayAccess {
-
-    /**
-     * Inner elements
-     *
-     * @var array
-     */
-    protected $elements = array();
-
-    /**
-     * Creates the element list.
-     *
-     * @param array $elements
-     */
-    public function __construct(array $elements) {
-
-        $this->elements = $elements;
-
-    }
-
-    /* {{{ Iterator interface */
-
-    /**
-     * Current position
-     *
-     * @var int
-     */
-    private $key = 0;
-
-    /**
-     * Returns current item in iteration
-     *
-     * @return Element
-     */
-    public function current() {
-
-        return $this->elements[$this->key];
-
-    }
-
-    /**
-     * To the next item in the iterator
-     *
-     * @return void
-     */
-    public function next() {
-
-        $this->key++;
-
-    }
-
-    /**
-     * Returns the current iterator key
-     *
-     * @return int
-     */
-    public function key() {
-
-        return $this->key;
-
-    }
-
-    /**
-     * Returns true if the current position in the iterator is a valid one
-     *
-     * @return bool
-     */
-    public function valid() {
-
-        return isset($this->elements[$this->key]);
-
-    }
-
-    /**
-     * Rewinds the iterator
-     *
-     * @return void
-     */
-    public function rewind() {
-
-        $this->key = 0;
-
-    }
-
-    /* }}} */
-
-    /* {{{ Countable interface */
-
-    /**
-     * Returns the number of elements
-     *
-     * @return int
-     */
-    public function count() {
-
-        return count($this->elements);
-
-    }
-
-    /* }}} */
-
-    /* {{{ ArrayAccess Interface */
-
-
-    /**
-     * Checks if an item exists through ArrayAccess.
-     *
-     * @param int $offset
-     * @return bool
-     */
-    public function offsetExists($offset) {
-
-        return isset($this->elements[$offset]);
-
-    }
-
-    /**
-     * Gets an item through ArrayAccess.
-     *
-     * @param int $offset
-     * @return mixed
-     */
-    public function offsetGet($offset) {
-
-        return $this->elements[$offset];
-
-    }
-
-    /**
-     * Sets an item through ArrayAccess.
-     *
-     * @param int $offset
-     * @param mixed $value
-     * @return void
-     */
-    public function offsetSet($offset,$value) {
-
-        throw new \LogicException('You can not add new objects to an ElementList');
-
-    }
-
-    /**
-     * Sets an item through ArrayAccess.
-     *
-     * This method just forwards the request to the inner iterator
-     *
-     * @param int $offset
-     * @return void
-     */
-    public function offsetUnset($offset) {
-
-        throw new \LogicException('You can not remove objects from an ElementList');
-
-    }
-
-    /* }}} */
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/FreeBusyGenerator.php b/vendor/sabre/vobject/lib/Sabre/VObject/FreeBusyGenerator.php
deleted file mode 100644
index 96d0be5ac..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/FreeBusyGenerator.php
+++ /dev/null
@@ -1,322 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * This class helps with generating FREEBUSY reports based on existing sets of
- * objects.
- *
- * It only looks at VEVENT and VFREEBUSY objects from the sourcedata, and
- * generates a single VFREEBUSY object.
- *
- * VFREEBUSY components are described in RFC5545, The rules for what should
- * go in a single freebusy report is taken from RFC4791, section 7.10.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class FreeBusyGenerator {
-
-    /**
-     * Input objects
-     *
-     * @var array
-     */
-    protected $objects;
-
-    /**
-     * Start of range
-     *
-     * @var DateTime|null
-     */
-    protected $start;
-
-    /**
-     * End of range
-     *
-     * @var DateTime|null
-     */
-    protected $end;
-
-    /**
-     * VCALENDAR object
-     *
-     * @var Component
-     */
-    protected $baseObject;
-
-    /**
-     * Creates the generator.
-     *
-     * Check the setTimeRange and setObjects methods for details about the
-     * arguments.
-     *
-     * @param DateTime $start
-     * @param DateTime $end
-     * @param mixed $objects
-     * @return void
-     */
-    public function __construct(\DateTime $start = null, \DateTime $end = null, $objects = null) {
-
-        if ($start && $end) {
-            $this->setTimeRange($start, $end);
-        }
-
-        if ($objects) {
-            $this->setObjects($objects);
-        }
-
-    }
-
-    /**
-     * Sets the VCALENDAR object.
-     *
-     * If this is set, it will not be generated for you. You are responsible
-     * for setting things like the METHOD, CALSCALE, VERSION, etc..
-     *
-     * The VFREEBUSY object will be automatically added though.
-     *
-     * @param Component $vcalendar
-     * @return void
-     */
-    public function setBaseObject(Component $vcalendar) {
-
-        $this->baseObject = $vcalendar;
-
-    }
-
-    /**
-     * Sets the input objects
-     *
-     * You must either specify a valendar object as a strong, or as the parse
-     * Component.
-     * It's also possible to specify multiple objects as an array.
-     *
-     * @param mixed $objects
-     * @return void
-     */
-    public function setObjects($objects) {
-
-        if (!is_array($objects)) {
-            $objects = array($objects);
-        }
-
-        $this->objects = array();
-        foreach($objects as $object) {
-
-            if (is_string($object)) {
-                $this->objects[] = Reader::read($object);
-            } elseif ($object instanceof Component) {
-                $this->objects[] = $object;
-            } else {
-                throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component arguments to setObjects');
-            }
-
-        }
-
-    }
-
-    /**
-     * Sets the time range
-     *
-     * Any freebusy object falling outside of this time range will be ignored.
-     *
-     * @param DateTime $start
-     * @param DateTime $end
-     * @return void
-     */
-    public function setTimeRange(\DateTime $start = null, \DateTime $end = null) {
-
-        $this->start = $start;
-        $this->end = $end;
-
-    }
-
-    /**
-     * Parses the input data and returns a correct VFREEBUSY object, wrapped in
-     * a VCALENDAR.
-     *
-     * @return Component
-     */
-    public function getResult() {
-
-        $busyTimes = array();
-
-        foreach($this->objects as $object) {
-
-            foreach($object->getBaseComponents() as $component) {
-
-                switch($component->name) {
-
-                    case 'VEVENT' :
-
-                        $FBTYPE = 'BUSY';
-                        if (isset($component->TRANSP) && (strtoupper($component->TRANSP) === 'TRANSPARENT')) {
-                            break;
-                        }
-                        if (isset($component->STATUS)) {
-                            $status = strtoupper($component->STATUS);
-                            if ($status==='CANCELLED') {
-                                break;
-                            }
-                            if ($status==='TENTATIVE') {
-                                $FBTYPE = 'BUSY-TENTATIVE';
-                            }
-                        }
-
-                        $times = array();
-
-                        if ($component->RRULE) {
-
-                            $iterator = new RecurrenceIterator($object, (string)$component->uid);
-                            if ($this->start) {
-                                $iterator->fastForward($this->start);
-                            }
-
-                            $maxRecurrences = 200;
-
-                            while($iterator->valid() && --$maxRecurrences) {
-
-                                $startTime = $iterator->getDTStart();
-                                if ($this->end && $startTime > $this->end) {
-                                    break;
-                                }
-                                $times[] = array(
-                                    $iterator->getDTStart(),
-                                    $iterator->getDTEnd(),
-                                );
-
-                                $iterator->next();
-
-                            }
-
-                        } else {
-
-                            $startTime = $component->DTSTART->getDateTime();
-                            if ($this->end && $startTime > $this->end) {
-                                break;
-                            }
-                            $endTime = null;
-                            if (isset($component->DTEND)) {
-                                $endTime = $component->DTEND->getDateTime();
-                            } elseif (isset($component->DURATION)) {
-                                $duration = DateTimeParser::parseDuration((string)$component->DURATION);
-                                $endTime = clone $startTime;
-                                $endTime->add($duration);
-                            } elseif ($component->DTSTART->getDateType() === Property\DateTime::DATE) {
-                                $endTime = clone $startTime;
-                                $endTime->modify('+1 day');
-                            } else {
-                                // The event had no duration (0 seconds)
-                                break;
-                            }
-
-                            $times[] = array($startTime, $endTime);
-
-                        }
-
-                        foreach($times as $time) {
-
-                            if ($this->end && $time[0] > $this->end) break;
-                            if ($this->start && $time[1] < $this->start) break;
-
-                            $busyTimes[] = array(
-                                $time[0],
-                                $time[1],
-                                $FBTYPE,
-                            );
-                        }
-                        break;
-
-                    case 'VFREEBUSY' :
-                        foreach($component->FREEBUSY as $freebusy) {
-
-                            $fbType = isset($freebusy['FBTYPE'])?strtoupper($freebusy['FBTYPE']):'BUSY';
-
-                            // Skipping intervals marked as 'free'
-                            if ($fbType==='FREE')
-                                continue;
-
-                            $values = explode(',', $freebusy);
-                            foreach($values as $value) {
-                                list($startTime, $endTime) = explode('/', $value);
-                                $startTime = DateTimeParser::parseDateTime($startTime);
-
-                                if (substr($endTime,0,1)==='P' || substr($endTime,0,2)==='-P') {
-                                    $duration = DateTimeParser::parseDuration($endTime);
-                                    $endTime = clone $startTime;
-                                    $endTime->add($duration);
-                                } else {
-                                    $endTime = DateTimeParser::parseDateTime($endTime);
-                                }
-
-                                if($this->start && $this->start > $endTime) continue;
-                                if($this->end && $this->end < $startTime) continue;
-                                $busyTimes[] = array(
-                                    $startTime,
-                                    $endTime,
-                                    $fbType
-                                );
-
-                            }
-
-
-                        }
-                        break;
-
-
-
-                }
-
-
-            }
-
-        }
-
-        if ($this->baseObject) {
-            $calendar = $this->baseObject;
-        } else {
-            $calendar = Component::create('VCALENDAR');
-            $calendar->version = '2.0';
-            $calendar->prodid = '-//Sabre//Sabre VObject ' . Version::VERSION . '//EN';
-            $calendar->calscale = 'GREGORIAN';
-        }
-
-        $vfreebusy = Component::create('VFREEBUSY');
-        $calendar->add($vfreebusy);
-
-        if ($this->start) {
-            $dtstart = Property::create('DTSTART');
-            $dtstart->setDateTime($this->start,Property\DateTime::UTC);
-            $vfreebusy->add($dtstart);
-        }
-        if ($this->end) {
-            $dtend = Property::create('DTEND');
-            $dtend->setDateTime($this->end,Property\DateTime::UTC);
-            $vfreebusy->add($dtend);
-        }
-        $dtstamp = Property::create('DTSTAMP');
-        $dtstamp->setDateTime(new \DateTime('now'), Property\DateTime::UTC);
-        $vfreebusy->add($dtstamp);
-
-        foreach($busyTimes as $busyTime) {
-
-            $busyTime[0]->setTimeZone(new \DateTimeZone('UTC'));
-            $busyTime[1]->setTimeZone(new \DateTimeZone('UTC'));
-
-            $prop = Property::create(
-                'FREEBUSY',
-                $busyTime[0]->format('Ymd\\THis\\Z') . '/' . $busyTime[1]->format('Ymd\\THis\\Z')
-            );
-            $prop['FBTYPE'] = $busyTime[2];
-            $vfreebusy->add($prop);
-
-        }
-
-        return $calendar;
-
-    }
-
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Node.php b/vendor/sabre/vobject/lib/Sabre/VObject/Node.php
deleted file mode 100644
index bee68ec2a..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Node.php
+++ /dev/null
@@ -1,187 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * Base class for all nodes
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable {
-
-    /**
-     * The following constants are used by the validate() method.
-     */
-    const REPAIR = 1;
-
-    /**
-     * Turns the object back into a serialized blob.
-     *
-     * @return string
-     */
-    abstract function serialize();
-
-    /**
-     * Iterator override
-     *
-     * @var ElementList
-     */
-    protected $iterator = null;
-
-    /**
-     * A link to the parent node
-     *
-     * @var Node
-     */
-    public $parent = null;
-
-    /**
-     * Validates the node for correctness.
-     *
-     * The following options are supported:
-     *   - Node::REPAIR - If something is broken, and automatic repair may
-     *                    be attempted.
-     *
-     * An array is returned with warnings.
-     *
-     * Every item in the array has the following properties:
-     *    * level - (number between 1 and 3 with severity information)
-     *    * message - (human readable message)
-     *    * node - (reference to the offending node)
-     *
-     * @param int $options
-     * @return array
-     */
-    public function validate($options = 0) {
-
-        return array();
-
-    }
-
-    /* {{{ IteratorAggregator interface */
-
-    /**
-     * Returns the iterator for this object
-     *
-     * @return ElementList
-     */
-    public function getIterator() {
-
-        if (!is_null($this->iterator))
-            return $this->iterator;
-
-        return new ElementList(array($this));
-
-    }
-
-    /**
-     * Sets the overridden iterator
-     *
-     * Note that this is not actually part of the iterator interface
-     *
-     * @param ElementList $iterator
-     * @return void
-     */
-    public function setIterator(ElementList $iterator) {
-
-        $this->iterator = $iterator;
-
-    }
-
-    /* }}} */
-
-    /* {{{ Countable interface */
-
-    /**
-     * Returns the number of elements
-     *
-     * @return int
-     */
-    public function count() {
-
-        $it = $this->getIterator();
-        return $it->count();
-
-    }
-
-    /* }}} */
-
-    /* {{{ ArrayAccess Interface */
-
-
-    /**
-     * Checks if an item exists through ArrayAccess.
-     *
-     * This method just forwards the request to the inner iterator
-     *
-     * @param int $offset
-     * @return bool
-     */
-    public function offsetExists($offset) {
-
-        $iterator = $this->getIterator();
-        return $iterator->offsetExists($offset);
-
-    }
-
-    /**
-     * Gets an item through ArrayAccess.
-     *
-     * This method just forwards the request to the inner iterator
-     *
-     * @param int $offset
-     * @return mixed
-     */
-    public function offsetGet($offset) {
-
-        $iterator = $this->getIterator();
-        return $iterator->offsetGet($offset);
-
-    }
-
-    /**
-     * Sets an item through ArrayAccess.
-     *
-     * This method just forwards the request to the inner iterator
-     *
-     * @param int $offset
-     * @param mixed $value
-     * @return void
-     */
-    public function offsetSet($offset,$value) {
-
-        $iterator = $this->getIterator();
-        $iterator->offsetSet($offset,$value);
-
-    // @codeCoverageIgnoreStart
-    //
-    // This method always throws an exception, so we ignore the closing
-    // brace
-    }
-    // @codeCoverageIgnoreEnd
-
-    /**
-     * Sets an item through ArrayAccess.
-     *
-     * This method just forwards the request to the inner iterator
-     *
-     * @param int $offset
-     * @return void
-     */
-    public function offsetUnset($offset) {
-
-        $iterator = $this->getIterator();
-        $iterator->offsetUnset($offset);
-
-    // @codeCoverageIgnoreStart
-    //
-    // This method always throws an exception, so we ignore the closing
-    // brace
-    }
-    // @codeCoverageIgnoreEnd
-
-    /* }}} */
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Parameter.php b/vendor/sabre/vobject/lib/Sabre/VObject/Parameter.php
deleted file mode 100644
index 72bf03b47..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Parameter.php
+++ /dev/null
@@ -1,104 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * VObject Parameter
- *
- * This class represents a parameter. A parameter is always tied to a property.
- * In the case of:
- *   DTSTART;VALUE=DATE:20101108
- * VALUE=DATE would be the parameter name and value.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Parameter extends Node {
-
-    /**
-     * Parameter name
-     *
-     * @var string
-     */
-    public $name;
-
-    /**
-     * Parameter value
-     *
-     * @var string
-     */
-    public $value;
-
-    /**
-     * Sets up the object
-     *
-     * @param string $name
-     * @param string $value
-     */
-    public function __construct($name, $value = null) {
-
-        if (!is_scalar($value) && !is_null($value)) {
-            throw new \InvalidArgumentException('The value argument must be a scalar value or null');
-        }
-
-        $this->name = strtoupper($name);
-        $this->value = $value;
-
-    }
-
-    /**
-     * Returns the parameter's internal value.
-     *
-     * @return string
-     */
-    public function getValue() {
-
-        return $this->value;
-
-    }
-
-
-    /**
-     * Turns the object back into a serialized blob.
-     *
-     * @return string
-     */
-    public function serialize() {
-
-        if (is_null($this->value)) {
-            return $this->name;
-        }
-        $src = array(
-            '\\',
-            "\n",
-            ';',
-            ',',
-        );
-        $out = array(
-            '\\\\',
-            '\n',
-            '\;',
-            '\,',
-        );
-
-        $value = str_replace($src, $out, $this->value);
-        if (strpos($value,":")!==false) {
-            $value = '"' . $value . '"';
-        }
-        return $this->name . '=' . $value;
-
-    }
-
-    /**
-     * Called when this object is being cast to a string
-     *
-     * @return string
-     */
-    public function __toString() {
-
-        return $this->value;
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/ParseException.php b/vendor/sabre/vobject/lib/Sabre/VObject/ParseException.php
deleted file mode 100644
index 66b49c606..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/ParseException.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * Exception thrown by Reader if an invalid object was attempted to be parsed.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class ParseException extends \Exception { }
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Property.php b/vendor/sabre/vobject/lib/Sabre/VObject/Property.php
deleted file mode 100644
index 63ae64574..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Property.php
+++ /dev/null
@@ -1,444 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * VObject Property
- *
- * A property in VObject is usually in the form PARAMNAME:paramValue.
- * An example is : SUMMARY:Weekly meeting
- *
- * Properties can also have parameters:
- * SUMMARY;LANG=en:Weekly meeting.
- *
- * Parameters can be accessed using the ArrayAccess interface.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Property extends Node {
-
-    /**
-     * Propertyname
-     *
-     * @var string
-     */
-    public $name;
-
-    /**
-     * Group name
-     *
-     * This may be something like 'HOME' for vcards.
-     *
-     * @var string
-     */
-    public $group;
-
-    /**
-     * Property parameters
-     *
-     * @var array
-     */
-    public $parameters = array();
-
-    /**
-     * Property value
-     *
-     * @var string
-     */
-    public $value;
-
-    /**
-     * If properties are added to this map, they will be automatically mapped
-     * to their respective classes, if parsed by the reader or constructed with
-     * the 'create' method.
-     *
-     * @var array
-     */
-    static public $classMap = array(
-        'COMPLETED'     => 'Sabre\\VObject\\Property\\DateTime',
-        'CREATED'       => 'Sabre\\VObject\\Property\\DateTime',
-        'DTEND'         => 'Sabre\\VObject\\Property\\DateTime',
-        'DTSTAMP'       => 'Sabre\\VObject\\Property\\DateTime',
-        'DTSTART'       => 'Sabre\\VObject\\Property\\DateTime',
-        'DUE'           => 'Sabre\\VObject\\Property\\DateTime',
-        'EXDATE'        => 'Sabre\\VObject\\Property\\MultiDateTime',
-        'LAST-MODIFIED' => 'Sabre\\VObject\\Property\\DateTime',
-        'RECURRENCE-ID' => 'Sabre\\VObject\\Property\\DateTime',
-        'TRIGGER'       => 'Sabre\\VObject\\Property\\DateTime',
-        'N'             => 'Sabre\\VObject\\Property\\Compound',
-        'ORG'           => 'Sabre\\VObject\\Property\\Compound',
-        'ADR'           => 'Sabre\\VObject\\Property\\Compound',
-        'CATEGORIES'    => 'Sabre\\VObject\\Property\\Compound',
-    );
-
-    /**
-     * Creates the new property by name, but in addition will also see if
-     * there's a class mapped to the property name.
-     *
-     * Parameters can be specified with the optional third argument. Parameters
-     * must be a key->value map of the parameter name, and value. If the value
-     * is specified as an array, it is assumed that multiple parameters with
-     * the same name should be added.
-     *
-     * @param string $name
-     * @param string $value
-     * @param array $parameters
-     * @return Property
-     */
-    static public function create($name, $value = null, array $parameters = array()) {
-
-        $name = strtoupper($name);
-        $shortName = $name;
-        $group = null;
-        if (strpos($shortName,'.')!==false) {
-            list($group, $shortName) = explode('.', $shortName);
-        }
-
-        if (isset(self::$classMap[$shortName])) {
-            return new self::$classMap[$shortName]($name, $value, $parameters);
-        } else {
-            return new self($name, $value, $parameters);
-        }
-
-    }
-
-    /**
-     * Creates a new property object
-     *
-     * Parameters can be specified with the optional third argument. Parameters
-     * must be a key->value map of the parameter name, and value. If the value
-     * is specified as an array, it is assumed that multiple parameters with
-     * the same name should be added.
-     *
-     * @param string $name
-     * @param string $value
-     * @param array $parameters
-     */
-    public function __construct($name, $value = null, array $parameters = array()) {
-
-        if (!is_scalar($value) && !is_null($value)) {
-            throw new \InvalidArgumentException('The value argument must be scalar or null');
-        }
-
-        $name = strtoupper($name);
-        $group = null;
-        if (strpos($name,'.')!==false) {
-            list($group, $name) = explode('.', $name);
-        }
-        $this->name = $name;
-        $this->group = $group;
-        $this->setValue($value);
-
-        foreach($parameters as $paramName => $paramValues) {
-
-            if (!is_array($paramValues)) {
-                $paramValues = array($paramValues);
-            }
-
-            foreach($paramValues as $paramValue) {
-                $this->add($paramName, $paramValue);
-            }
-
-        }
-
-    }
-
-    /**
-     * Updates the internal value
-     *
-     * @param string $value
-     * @return void
-     */
-    public function setValue($value) {
-
-        $this->value = $value;
-
-    }
-
-    /**
-     * Returns the internal value
-     *
-     * @param string $value
-     * @return string
-     */
-    public function getValue() {
-
-        return $this->value;
-
-    }
-
-    /**
-     * Turns the object back into a serialized blob.
-     *
-     * @return string
-     */
-    public function serialize() {
-
-        $str = $this->name;
-        if ($this->group) $str = $this->group . '.' . $this->name;
-
-        foreach($this->parameters as $param) {
-
-            $str.=';' . $param->serialize();
-
-        }
-
-        $src = array(
-            '\\',
-            "\n",
-            "\r",
-        );
-        $out = array(
-            '\\\\',
-            '\n',
-            '',
-        );
-        $str.=':' . str_replace($src, $out, $this->value);
-
-        $out = '';
-        while(strlen($str)>0) {
-            if (strlen($str)>75) {
-                $out.= mb_strcut($str,0,75,'utf-8') . "\r\n";
-                $str = ' ' . mb_strcut($str,75,strlen($str),'utf-8');
-            } else {
-                $out.=$str . "\r\n";
-                $str='';
-                break;
-            }
-        }
-
-        return $out;
-
-    }
-
-    /**
-     * Adds a new componenten or element
-     *
-     * You can call this method with the following syntaxes:
-     *
-     * add(Parameter $element)
-     * add(string $name, $value)
-     *
-     * The first version adds an Parameter
-     * The second adds a property as a string.
-     *
-     * @param mixed $item
-     * @param mixed $itemValue
-     * @return void
-     */
-    public function add($item, $itemValue = null) {
-
-        if ($item instanceof Parameter) {
-            if (!is_null($itemValue)) {
-                throw new \InvalidArgumentException('The second argument must not be specified, when passing a VObject');
-            }
-            $item->parent = $this;
-            $this->parameters[] = $item;
-        } elseif(is_string($item)) {
-
-            $parameter = new Parameter($item,$itemValue);
-            $parameter->parent = $this;
-            $this->parameters[] = $parameter;
-
-        } else {
-
-            throw new \InvalidArgumentException('The first argument must either be a Node a string');
-
-        }
-
-    }
-
-    /* ArrayAccess interface {{{ */
-
-    /**
-     * Checks if an array element exists
-     *
-     * @param mixed $name
-     * @return bool
-     */
-    public function offsetExists($name) {
-
-        if (is_int($name)) return parent::offsetExists($name);
-
-        $name = strtoupper($name);
-
-        foreach($this->parameters as $parameter) {
-            if ($parameter->name == $name) return true;
-        }
-        return false;
-
-    }
-
-    /**
-     * Returns a parameter, or parameter list.
-     *
-     * @param string $name
-     * @return Node
-     */
-    public function offsetGet($name) {
-
-        if (is_int($name)) return parent::offsetGet($name);
-        $name = strtoupper($name);
-
-        $result = array();
-        foreach($this->parameters as $parameter) {
-            if ($parameter->name == $name)
-                $result[] = $parameter;
-        }
-
-        if (count($result)===0) {
-            return null;
-        } elseif (count($result)===1) {
-            return $result[0];
-        } else {
-            $result[0]->setIterator(new ElementList($result));
-            return $result[0];
-        }
-
-    }
-
-    /**
-     * Creates a new parameter
-     *
-     * @param string $name
-     * @param mixed $value
-     * @return void
-     */
-    public function offsetSet($name, $value) {
-
-        if (is_int($name)) parent::offsetSet($name, $value);
-
-        if (is_scalar($value)) {
-            if (!is_string($name))
-                throw new \InvalidArgumentException('A parameter name must be specified. This means you cannot use the $array[]="string" to add parameters.');
-
-            $this->offsetUnset($name);
-            $parameter = new Parameter($name, $value);
-            $parameter->parent = $this;
-            $this->parameters[] = $parameter;
-
-        } elseif ($value instanceof Parameter) {
-            if (!is_null($name))
-                throw new \InvalidArgumentException('Don\'t specify a parameter name if you\'re passing a \\Sabre\\VObject\\Parameter. Add using $array[]=$parameterObject.');
-
-            $value->parent = $this;
-            $this->parameters[] = $value;
-        } else {
-            throw new \InvalidArgumentException('You can only add parameters to the property object');
-        }
-
-    }
-
-    /**
-     * Removes one or more parameters with the specified name
-     *
-     * @param string $name
-     * @return void
-     */
-    public function offsetUnset($name) {
-
-        if (is_int($name)) parent::offsetUnset($name);
-        $name = strtoupper($name);
-
-        foreach($this->parameters as $key=>$parameter) {
-            if ($parameter->name == $name) {
-                $parameter->parent = null;
-                unset($this->parameters[$key]);
-            }
-
-        }
-
-    }
-
-    /* }}} */
-
-    /**
-     * Called when this object is being cast to a string
-     *
-     * @return string
-     */
-    public function __toString() {
-
-        return (string)$this->value;
-
-    }
-
-    /**
-     * This method is automatically called when the object is cloned.
-     * Specifically, this will ensure all child elements are also cloned.
-     *
-     * @return void
-     */
-    public function __clone() {
-
-        foreach($this->parameters as $key=>$child) {
-            $this->parameters[$key] = clone $child;
-            $this->parameters[$key]->parent = $this;
-        }
-
-    }
-
-    /**
-     * Validates the node for correctness.
-     *
-     * The following options are supported:
-     *   - Node::REPAIR - If something is broken, and automatic repair may
-     *                    be attempted.
-     *
-     * An array is returned with warnings.
-     *
-     * Every item in the array has the following properties:
-     *    * level - (number between 1 and 3 with severity information)
-     *    * message - (human readable message)
-     *    * node - (reference to the offending node)
-     *
-     * @param int $options
-     * @return array
-     */
-    public function validate($options = 0) {
-
-        $warnings = array();
-
-        // Checking if our value is UTF-8
-        if (!StringUtil::isUTF8($this->value)) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'Property is not valid UTF-8!',
-                'node' => $this,
-            );
-            if ($options & self::REPAIR) {
-                $this->value = StringUtil::convertToUTF8($this->value);
-            }
-        }
-
-        // Checking if the propertyname does not contain any invalid bytes.
-        if (!preg_match('/^([A-Z0-9-]+)$/', $this->name)) {
-            $warnings[] = array(
-                'level' => 1,
-                'message' => 'The propertyname: ' . $this->name . ' contains invalid characters. Only A-Z, 0-9 and - are allowed',
-                'node' => $this,
-            );
-            if ($options & self::REPAIR) {
-                // Uppercasing and converting underscores to dashes.
-                $this->name = strtoupper(
-                    str_replace('_', '-', $this->name)
-                );
-                // Removing every other invalid character
-                $this->name = preg_replace('/([^A-Z0-9-])/u', '', $this->name);
-
-            }
-
-        }
-
-        // Validating inner parameters
-        foreach($this->parameters as $param) {
-            $warnings = array_merge($warnings, $param->validate($options));
-        }
-
-        return $warnings;
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Property/Compound.php b/vendor/sabre/vobject/lib/Sabre/VObject/Property/Compound.php
deleted file mode 100644
index 26f090069..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Property/Compound.php
+++ /dev/null
@@ -1,125 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Property;
-
-use Sabre\VObject;
-
-/**
- * Compound property.
- *
- * This class adds (de)serialization of compound properties to/from arrays.
- *
- * Currently the following properties from RFC 6350 are mapped to use this
- * class:
- *
- *  N:          Section 6.2.2
- *  ADR:        Section 6.3.1
- *  ORG:        Section 6.6.4
- *  CATEGORIES: Section 6.7.1
- *
- * In order to use this correctly, you must call setParts and getParts to
- * retrieve and modify dates respectively.
- *
- * @author Thomas Tanghus (http://tanghus.net/)
- * @author Lars Kneschke
- * @author Evert Pot (http://evertpot.com/)
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Compound extends VObject\Property {
-
-    /**
-     * If property names are added to this map, they will be (de)serialised as arrays
-     * using the getParts() and setParts() methods.
-     * The keys are the property names, values are delimiter chars.
-     *
-     * @var array
-     */
-    static public $delimiterMap = array(
-        'N'           =>    ';',
-        'ADR'         =>    ';',
-        'ORG'         =>    ';',
-        'CATEGORIES'  =>    ',',
-    );
-
-    /**
-     * The currently used delimiter.
-     *
-     * @var string
-     */
-    protected $delimiter = null;
-
-    /**
-     * Get a compound value as an array.
-     *
-     * @param $name string
-     * @return array
-     */
-    public function getParts() {
-
-        if (is_null($this->value)) {
-            return array();
-        }
-
-        $delimiter = $this->getDelimiter();
-
-        // split by any $delimiter which is NOT prefixed by a slash.
-        // Note that this is not a a perfect solution. If a value is prefixed
-        // by two slashes, it should actually be split anyway.
-        //
-        // Hopefully we can fix this better in a future version, where we can
-        // break compatibility a bit.
-        $compoundValues = preg_split("/(?<!\\\)$delimiter/", $this->value);
-
-        // remove slashes from any semicolon and comma left escaped in the single values
-        $compoundValues = array_map(
-            function($val) {
-                return strtr($val, array('\,' => ',', '\;' => ';'));
-        }, $compoundValues);
-
-        return $compoundValues;
-
-    }
-
-    /**
-     * Returns the delimiter for this property.
-     *
-     * @return string
-     */
-    public function getDelimiter() {
-
-        if (!$this->delimiter) {
-            if (isset(self::$delimiterMap[$this->name])) {
-                $this->delimiter = self::$delimiterMap[$this->name];
-            } else {
-                // To be a bit future proof, we are going to default the
-                // delimiter to ;
-                $this->delimiter = ';';
-            }
-        }
-        return $this->delimiter;
-
-    }
-
-    /**
-     * Set a compound value as an array.
-     *
-     *
-     * @param $name string
-     * @return array
-     */
-    public function setParts(array $values) {
-
-        // add slashes to all semicolons and commas in the single values
-        $values = array_map(
-            function($val) {
-                return strtr($val, array(',' => '\,', ';' => '\;'));
-            }, $values);
-
-        $this->setValue(
-            implode($this->getDelimiter(), $values)
-        );
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Property/DateTime.php b/vendor/sabre/vobject/lib/Sabre/VObject/Property/DateTime.php
deleted file mode 100644
index 95e9b0209..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Property/DateTime.php
+++ /dev/null
@@ -1,245 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Property;
-
-use Sabre\VObject;
-
-/**
- * DateTime property
- *
- * This element is used for iCalendar properties such as the DTSTART property.
- * It basically provides a few helper functions that make it easier to deal
- * with these. It supports both DATE-TIME and DATE values.
- *
- * In order to use this correctly, you must call setDateTime and getDateTime to
- * retrieve and modify dates respectively.
- *
- * If you use the 'value' or properties directly, this object does not keep
- * reference and results might appear incorrectly.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class DateTime extends VObject\Property {
-
-    /**
-     * Local 'floating' time
-     */
-    const LOCAL = 1;
-
-    /**
-     * UTC-based time
-     */
-    const UTC = 2;
-
-    /**
-     * Local time plus timezone
-     */
-    const LOCALTZ = 3;
-
-    /**
-     * Only a date, time is ignored
-     */
-    const DATE = 4;
-
-    /**
-     * DateTime representation
-     *
-     * @var \DateTime
-     */
-    protected $dateTime;
-
-    /**
-     * dateType
-     *
-     * @var int
-     */
-    protected $dateType;
-
-    /**
-     * Updates the Date and Time.
-     *
-     * @param \DateTime $dt
-     * @param int $dateType
-     * @return void
-     */
-    public function setDateTime(\DateTime $dt, $dateType = self::LOCALTZ) {
-
-        switch($dateType) {
-
-            case self::LOCAL :
-                $this->setValue($dt->format('Ymd\\THis'));
-                $this->offsetUnset('VALUE');
-                $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATE-TIME');
-                break;
-            case self::UTC :
-                $dt->setTimeZone(new \DateTimeZone('UTC'));
-                $this->setValue($dt->format('Ymd\\THis\\Z'));
-                $this->offsetUnset('VALUE');
-                $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATE-TIME');
-                break;
-            case self::LOCALTZ :
-                $this->setValue($dt->format('Ymd\\THis'));
-                $this->offsetUnset('VALUE');
-                $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATE-TIME');
-                $this->offsetSet('TZID', $dt->getTimeZone()->getName());
-                break;
-            case self::DATE :
-                $this->setValue($dt->format('Ymd'));
-                $this->offsetUnset('VALUE');
-                $this->offsetUnset('TZID');
-                $this->offsetSet('VALUE','DATE');
-                break;
-            default :
-                throw new \InvalidArgumentException('You must pass a valid dateType constant');
-
-        }
-        $this->dateTime = $dt;
-        $this->dateType = $dateType;
-
-    }
-
-    /**
-     * Returns the current DateTime value.
-     *
-     * If no value was set, this method returns null.
-     *
-     * @return \DateTime|null
-     */
-    public function getDateTime() {
-
-        if ($this->dateTime)
-            return $this->dateTime;
-
-        list(
-            $this->dateType,
-            $this->dateTime
-        ) = self::parseData($this->value, $this);
-        return $this->dateTime;
-
-    }
-
-    /**
-     * Returns the type of Date format.
-     *
-     * This method returns one of the format constants. If no date was set,
-     * this method will return null.
-     *
-     * @return int|null
-     */
-    public function getDateType() {
-
-        if ($this->dateType)
-            return $this->dateType;
-
-        list(
-            $this->dateType,
-            $this->dateTime,
-        ) = self::parseData($this->value, $this);
-        return $this->dateType;
-
-    }
-
-    /**
-     * This method will return true, if the property had a date and a time, as
-     * opposed to only a date.
-     *
-     * @return bool
-     */
-    public function hasTime() {
-
-        return $this->getDateType()!==self::DATE;
-
-    }
-
-    /**
-     * Parses the internal data structure to figure out what the current date
-     * and time is.
-     *
-     * The returned array contains two elements:
-     *   1. A 'DateType' constant (as defined on this class), or null.
-     *   2. A DateTime object (or null)
-     *
-     * @param string|null $propertyValue The string to parse (yymmdd or
-     *                                   ymmddThhmmss, etc..)
-     * @param \Sabre\VObject\Property|null $property The instance of the
-     *                                              property we're parsing.
-     * @return array
-     */
-    static public function parseData($propertyValue, VObject\Property $property = null) {
-
-        if (is_null($propertyValue)) {
-            return array(null, null);
-        }
-
-        $date = '(?P<year>[1-2][0-9]{3})(?P<month>[0-1][0-9])(?P<date>[0-3][0-9])';
-        $time = '(?P<hour>[0-2][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9])';
-        $regex = "/^$date(T$time(?P<isutc>Z)?)?$/";
-
-        if (!preg_match($regex, $propertyValue, $matches)) {
-            throw new \InvalidArgumentException($propertyValue . ' is not a valid \DateTime or Date string');
-        }
-
-        if (!isset($matches['hour'])) {
-            // Date-only
-            return array(
-                self::DATE,
-                new \DateTime($matches['year'] . '-' . $matches['month'] . '-' . $matches['date'] . ' 00:00:00', new \DateTimeZone('UTC')),
-            );
-        }
-
-        $dateStr =
-            $matches['year'] .'-' .
-            $matches['month'] . '-' .
-            $matches['date'] . ' ' .
-            $matches['hour'] . ':' .
-            $matches['minute'] . ':' .
-            $matches['second'];
-
-        if (isset($matches['isutc'])) {
-            $dt = new \DateTime($dateStr,new \DateTimeZone('UTC'));
-            $dt->setTimeZone(new \DateTimeZone('UTC'));
-            return array(
-                self::UTC,
-                $dt
-            );
-        }
-
-        // Finding the timezone.
-        $tzid = $property['TZID'];
-        if (!$tzid) {
-            // This was a floating time string. This implies we use the
-            // timezone from date_default_timezone_set / date.timezone ini
-            // setting.
-            return array(
-                self::LOCAL,
-                new \DateTime($dateStr)
-            );
-        }
-
-        // To look up the timezone, we must first find the VCALENDAR component.
-        $root = $property;
-        while($root->parent) {
-            $root = $root->parent;
-        }
-        if ($root->name === 'VCALENDAR') {
-            $tz = VObject\TimeZoneUtil::getTimeZone((string)$tzid, $root);
-        } else {
-            $tz = VObject\TimeZoneUtil::getTimeZone((string)$tzid);
-        }
-
-        $dt = new \DateTime($dateStr, $tz);
-        $dt->setTimeZone($tz);
-
-        return array(
-            self::LOCALTZ,
-            $dt
-        );
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Property/MultiDateTime.php b/vendor/sabre/vobject/lib/Sabre/VObject/Property/MultiDateTime.php
deleted file mode 100644
index f01491b66..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Property/MultiDateTime.php
+++ /dev/null
@@ -1,180 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Property;
-
-use Sabre\VObject;
-
-/**
- * Multi-DateTime property
- *
- * This element is used for iCalendar properties such as the EXDATE property.
- * It basically provides a few helper functions that make it easier to deal
- * with these. It supports both DATE-TIME and DATE values.
- *
- * In order to use this correctly, you must call setDateTimes and getDateTimes
- * to retrieve and modify dates respectively.
- *
- * If you use the 'value' or properties directly, this object does not keep
- * reference and results might appear incorrectly.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class MultiDateTime extends VObject\Property {
-
-    /**
-     * DateTime representation
-     *
-     * @var DateTime[]
-     */
-    protected $dateTimes;
-
-    /**
-     * dateType
-     *
-     * This is one of the Sabre\VObject\Property\DateTime constants.
-     *
-     * @var int
-     */
-    protected $dateType;
-
-    /**
-     * Updates the value
-     *
-     * @param array $dt Must be an array of DateTime objects.
-     * @param int $dateType
-     * @return void
-     */
-    public function setDateTimes(array $dt, $dateType = VObject\Property\DateTime::LOCALTZ) {
-
-        foreach($dt as $i)
-            if (!$i instanceof \DateTime)
-                throw new \InvalidArgumentException('You must pass an array of DateTime objects');
-
-        $this->offsetUnset('VALUE');
-        $this->offsetUnset('TZID');
-        switch($dateType) {
-
-            case DateTime::LOCAL :
-                $val = array();
-                foreach($dt as $i) {
-                    $val[] = $i->format('Ymd\\THis');
-                }
-                $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATE-TIME');
-                break;
-            case DateTime::UTC :
-                $val = array();
-                foreach($dt as $i) {
-                    $i->setTimeZone(new \DateTimeZone('UTC'));
-                    $val[] = $i->format('Ymd\\THis\\Z');
-                }
-                $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATE-TIME');
-                break;
-            case DateTime::LOCALTZ :
-                $val = array();
-                foreach($dt as $i) {
-                    $val[] = $i->format('Ymd\\THis');
-                }
-                $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATE-TIME');
-                $this->offsetSet('TZID', $dt[0]->getTimeZone()->getName());
-                break;
-            case DateTime::DATE :
-                $val = array();
-                foreach($dt as $i) {
-                    $val[] = $i->format('Ymd');
-                }
-                $this->setValue(implode(',',$val));
-                $this->offsetSet('VALUE','DATE');
-                break;
-            default :
-                throw new \InvalidArgumentException('You must pass a valid dateType constant');
-
-        }
-        $this->dateTimes = $dt;
-        $this->dateType = $dateType;
-
-    }
-
-    /**
-     * Returns the current DateTime value.
-     *
-     * If no value was set, this method returns null.
-     *
-     * @return array|null
-     */
-    public function getDateTimes() {
-
-        if ($this->dateTimes)
-            return $this->dateTimes;
-
-        $dts = array();
-
-        if (!$this->value) {
-            $this->dateTimes = null;
-            $this->dateType = null;
-            return null;
-        }
-
-        foreach(explode(',',$this->value) as $val) {
-            list(
-                $type,
-                $dt
-            ) = DateTime::parseData($val, $this);
-            $dts[] = $dt;
-            $this->dateType = $type;
-        }
-        $this->dateTimes = $dts;
-        return $this->dateTimes;
-
-    }
-
-    /**
-     * Returns the type of Date format.
-     *
-     * This method returns one of the format constants. If no date was set,
-     * this method will return null.
-     *
-     * @return int|null
-     */
-    public function getDateType() {
-
-        if ($this->dateType)
-            return $this->dateType;
-
-        if (!$this->value) {
-            $this->dateTimes = null;
-            $this->dateType = null;
-            return null;
-        }
-
-        $dts = array();
-        foreach(explode(',',$this->value) as $val) {
-            list(
-                $type,
-                $dt
-            ) = DateTime::parseData($val, $this);
-            $dts[] = $dt;
-            $this->dateType = $type;
-        }
-        $this->dateTimes = $dts;
-        return $this->dateType;
-
-    }
-
-    /**
-     * This method will return true, if the property had a date and a time, as
-     * opposed to only a date.
-     *
-     * @return bool
-     */
-    public function hasTime() {
-
-        return $this->getDateType()!==DateTime::DATE;
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Reader.php b/vendor/sabre/vobject/lib/Sabre/VObject/Reader.php
deleted file mode 100644
index a001b2bf1..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Reader.php
+++ /dev/null
@@ -1,223 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * VCALENDAR/VCARD reader
- *
- * This class reads the vobject file, and returns a full element tree.
- *
- * TODO: this class currently completely works 'statically'. This is pointless,
- * and defeats OOP principals. Needs refactoring in a future version.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Reader {
-
-    /**
-     * If this option is passed to the reader, it will be less strict about the
-     * validity of the lines.
-     *
-     * Currently using this option just means, that it will accept underscores
-     * in property names.
-     */
-    const OPTION_FORGIVING = 1;
-
-    /**
-     * If this option is turned on, any lines we cannot parse will be ignored
-     * by the reader.
-     */
-    const OPTION_IGNORE_INVALID_LINES = 2;
-
-    /**
-     * Parses the file and returns the top component
-     *
-     * The options argument is a bitfield. Pass any of the OPTIONS constant to
-     * alter the parsers' behaviour.
-     *
-     * @param string $data
-     * @param int $options
-     * @return Node
-     */
-    static function read($data, $options = 0) {
-
-        // Normalizing newlines
-        $data = str_replace(array("\r","\n\n"), array("\n","\n"), $data);
-
-        $lines = explode("\n", $data);
-
-        // Unfolding lines
-        $lines2 = array();
-        foreach($lines as $line) {
-
-            // Skipping empty lines
-            if (!$line) continue;
-
-            if ($line[0]===" " || $line[0]==="\t") {
-                $lines2[count($lines2)-1].=substr($line,1);
-            } else {
-                $lines2[] = $line;
-            }
-
-        }
-
-        unset($lines);
-
-        reset($lines2);
-
-        return self::readLine($lines2, $options);
-
-    }
-
-    /**
-     * Reads and parses a single line.
-     *
-     * This method receives the full array of lines. The array pointer is used
-     * to traverse.
-     *
-     * This method returns null if an invalid line was encountered, and the
-     * IGNORE_INVALID_LINES option was turned on.
-     *
-     * @param array $lines
-     * @param int $options See the OPTIONS constants.
-     * @return Node
-     */
-    static private function readLine(&$lines, $options = 0) {
-
-        $line = current($lines);
-        $lineNr = key($lines);
-        next($lines);
-
-        // Components
-        if (strtoupper(substr($line,0,6)) === "BEGIN:") {
-
-            $componentName = strtoupper(substr($line,6));
-            $obj = Component::create($componentName);
-
-            $nextLine = current($lines);
-
-            while(strtoupper(substr($nextLine,0,4))!=="END:") {
-
-                $parsedLine = self::readLine($lines, $options);
-                $nextLine = current($lines);
-
-                if (is_null($parsedLine)) {
-                    continue;
-                }
-                $obj->add($parsedLine);
-
-                if ($nextLine===false)
-                    throw new ParseException('Invalid VObject. Document ended prematurely.');
-
-            }
-
-            // Checking component name of the 'END:' line.
-            if (substr($nextLine,4)!==$obj->name) {
-                throw new ParseException('Invalid VObject, expected: "END:' . $obj->name . '" got: "' . $nextLine . '"');
-            }
-            next($lines);
-
-            return $obj;
-
-        }
-
-        // Properties
-        //$result = preg_match('/(?P<name>[A-Z0-9-]+)(?:;(?P<parameters>^(?<!:):))(.*)$/',$line,$matches);
-
-        if ($options & self::OPTION_FORGIVING) {
-            $token = '[A-Z0-9-\._]+';
-        } else {
-            $token = '[A-Z0-9-\.]+';
-        }
-        $parameters = "(?:;(?P<parameters>([^:^\"]|\"([^\"]*)\")*))?";
-        $regex = "/^(?P<name>$token)$parameters:(?P<value>.*)$/i";
-
-        $result = preg_match($regex,$line,$matches);
-
-        if (!$result) {
-            if ($options & self::OPTION_IGNORE_INVALID_LINES) {
-                return null;
-            } else {
-                throw new ParseException('Invalid VObject, line ' . ($lineNr+1) . ' did not follow the icalendar/vcard format');
-            }
-        }
-
-        $propertyName = strtoupper($matches['name']);
-        $propertyValue = preg_replace_callback('#(\\\\(\\\\|N|n))#',function($matches) {
-            if ($matches[2]==='n' || $matches[2]==='N') {
-                return "\n";
-            } else {
-                return $matches[2];
-            }
-        }, $matches['value']);
-
-        $obj = Property::create($propertyName, $propertyValue);
-
-        if ($matches['parameters']) {
-
-            foreach(self::readParameters($matches['parameters']) as $param) {
-                $obj->add($param);
-            }
-
-        }
-
-        return $obj;
-
-
-    }
-
-    /**
-     * Reads a parameter list from a property
-     *
-     * This method returns an array of Parameter
-     *
-     * @param string $parameters
-     * @return array
-     */
-    static private function readParameters($parameters) {
-
-        $token = '[A-Z0-9-]+';
-
-        $paramValue = '(?P<paramValue>[^\"^;]*|"[^"]*")';
-
-        $regex = "/(?<=^|;)(?P<paramName>$token)(=$paramValue(?=$|;))?/i";
-        preg_match_all($regex, $parameters, $matches,  PREG_SET_ORDER);
-
-        $params = array();
-        foreach($matches as $match) {
-
-            if (!isset($match['paramValue'])) {
-
-                $value = null;
-
-            } else {
-
-                $value = $match['paramValue'];
-
-                if (isset($value[0]) && $value[0]==='"') {
-                    // Stripping quotes, if needed
-                    $value = substr($value,1,strlen($value)-2);
-                }
-
-                $value = preg_replace_callback('#(\\\\(\\\\|N|n|;|,))#',function($matches) {
-                    if ($matches[2]==='n' || $matches[2]==='N') {
-                        return "\n";
-                    } else {
-                        return $matches[2];
-                    }
-                }, $value);
-
-            }
-
-            $params[] = new Parameter($match['paramName'], $value);
-
-        }
-
-        return $params;
-
-    }
-
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/RecurrenceIterator.php b/vendor/sabre/vobject/lib/Sabre/VObject/RecurrenceIterator.php
deleted file mode 100644
index 8bd4ed224..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/RecurrenceIterator.php
+++ /dev/null
@@ -1,1144 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * This class is used to determine new for a recurring event, when the next
- * events occur.
- *
- * This iterator may loop infinitely in the future, therefore it is important
- * that if you use this class, you set hard limits for the amount of iterations
- * you want to handle.
- *
- * Note that currently there is not full support for the entire iCalendar
- * specification, as it's very complex and contains a lot of permutations
- * that's not yet used very often in software.
- *
- * For the focus has been on features as they actually appear in Calendaring
- * software, but this may well get expanded as needed / on demand
- *
- * The following RRULE properties are supported
- *   * UNTIL
- *   * INTERVAL
- *   * COUNT
- *   * FREQ=DAILY
- *     * BYDAY
- *     * BYHOUR
- *   * FREQ=WEEKLY
- *     * BYDAY
- *     * BYHOUR
- *     * WKST
- *   * FREQ=MONTHLY
- *     * BYMONTHDAY
- *     * BYDAY
- *     * BYSETPOS
- *   * FREQ=YEARLY
- *     * BYMONTH
- *     * BYMONTHDAY (only if BYMONTH is also set)
- *     * BYDAY (only if BYMONTH is also set)
- *
- * Anything beyond this is 'undefined', which means that it may get ignored, or
- * you may get unexpected results. The effect is that in some applications the
- * specified recurrence may look incorrect, or is missing.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class RecurrenceIterator implements \Iterator {
-
-    /**
-     * The initial event date
-     *
-     * @var DateTime
-     */
-    public $startDate;
-
-    /**
-     * The end-date of the initial event
-     *
-     * @var DateTime
-     */
-    public $endDate;
-
-    /**
-     * The 'current' recurrence.
-     *
-     * This will be increased for every iteration.
-     *
-     * @var DateTime
-     */
-    public $currentDate;
-
-
-    /**
-     * List of dates that are excluded from the rules.
-     *
-     * This list contains the items that have been overriden by the EXDATE
-     * property.
-     *
-     * @var array
-     */
-    public $exceptionDates = array();
-
-    /**
-     * Base event
-     *
-     * @var Component\VEvent
-     */
-    public $baseEvent;
-
-    /**
-     * List of dates that are overridden by other events.
-     * Similar to $overriddenEvents, but this just contains the original dates.
-     *
-     * @var array
-     */
-    public $overriddenDates = array();
-
-    /**
-     * list of events that are 'overridden'.
-     *
-     * This is an array of Component\VEvent objects.
-     *
-     * @var array
-     */
-    public $overriddenEvents = array();
-
-    /**
-     * Frequency is one of: secondly, minutely, hourly, daily, weekly, monthly,
-     * yearly.
-     *
-     * @var string
-     */
-    public $frequency;
-
-    /**
-     * The last instance of this recurrence, inclusively
-     *
-     * @var DateTime|null
-     */
-    public $until;
-
-    /**
-     * The number of recurrences, or 'null' if infinitely recurring.
-     *
-     * @var int
-     */
-    public $count;
-
-    /**
-     * The interval.
-     *
-     * If for example frequency is set to daily, interval = 2 would mean every
-     * 2 days.
-     *
-     * @var int
-     */
-    public $interval = 1;
-
-    /**
-     * Which seconds to recur.
-     *
-     * This is an array of integers (between 0 and 60)
-     *
-     * @var array
-     */
-    public $bySecond;
-
-    /**
-     * Which minutes to recur
-     *
-     * This is an array of integers (between 0 and 59)
-     *
-     * @var array
-     */
-    public $byMinute;
-
-    /**
-     * Which hours to recur
-     *
-     * This is an array of integers (between 0 and 23)
-     *
-     * @var array
-     */
-    public $byHour;
-
-    /**
-     * Which weekdays to recur.
-     *
-     * This is an array of weekdays
-     *
-     * This may also be preceeded by a positive or negative integer. If present,
-     * this indicates the nth occurrence of a specific day within the monthly or
-     * yearly rrule. For instance, -2TU indicates the second-last tuesday of
-     * the month, or year.
-     *
-     * @var array
-     */
-    public $byDay;
-
-    /**
-     * Which days of the month to recur
-     *
-     * This is an array of days of the months (1-31). The value can also be
-     * negative. -5 for instance means the 5th last day of the month.
-     *
-     * @var array
-     */
-    public $byMonthDay;
-
-    /**
-     * Which days of the year to recur.
-     *
-     * This is an array with days of the year (1 to 366). The values can also
-     * be negative. For instance, -1 will always represent the last day of the
-     * year. (December 31st).
-     *
-     * @var array
-     */
-    public $byYearDay;
-
-    /**
-     * Which week numbers to recur.
-     *
-     * This is an array of integers from 1 to 53. The values can also be
-     * negative. -1 will always refer to the last week of the year.
-     *
-     * @var array
-     */
-    public $byWeekNo;
-
-    /**
-     * Which months to recur
-     *
-     * This is an array of integers from 1 to 12.
-     *
-     * @var array
-     */
-    public $byMonth;
-
-    /**
-     * Which items in an existing st to recur.
-     *
-     * These numbers work together with an existing by* rule. It specifies
-     * exactly which items of the existing by-rule to filter.
-     *
-     * Valid values are 1 to 366 and -1 to -366. As an example, this can be
-     * used to recur the last workday of the month.
-     *
-     * This would be done by setting frequency to 'monthly', byDay to
-     * 'MO,TU,WE,TH,FR' and bySetPos to -1.
-     *
-     * @var array
-     */
-    public $bySetPos;
-
-    /**
-     * When a week starts
-     *
-     * @var string
-     */
-    public $weekStart = 'MO';
-
-    /**
-     * The current item in the list
-     *
-     * @var int
-     */
-    public $counter = 0;
-
-    /**
-     * Simple mapping from iCalendar day names to day numbers
-     *
-     * @var array
-     */
-    private $dayMap = array(
-        'SU' => 0,
-        'MO' => 1,
-        'TU' => 2,
-        'WE' => 3,
-        'TH' => 4,
-        'FR' => 5,
-        'SA' => 6,
-    );
-
-    /**
-     * Mappings between the day number and english day name.
-     *
-     * @var array
-     */
-    private $dayNames = array(
-        0 => 'Sunday',
-        1 => 'Monday',
-        2 => 'Tuesday',
-        3 => 'Wednesday',
-        4 => 'Thursday',
-        5 => 'Friday',
-        6 => 'Saturday',
-    );
-
-    /**
-     * If the current iteration of the event is an overriden event, this
-     * property will hold the VObject
-     *
-     * @var Component
-     */
-    private $currentOverriddenEvent;
-
-    /**
-     * This property may contain the date of the next not-overridden event.
-     * This date is calculated sometimes a bit early, before overridden events
-     * are evaluated.
-     *
-     * @var DateTime
-     */
-    private $nextDate;
-
-    /**
-     * This counts the number of overridden events we've handled so far
-     *
-     * @var int
-     */
-    private $handledOverridden = 0;
-
-    /**
-     * Creates the iterator
-     *
-     * You should pass a VCALENDAR component, as well as the UID of the event
-     * we're going to traverse.
-     *
-     * @param Component $vcal
-     * @param string|null $uid
-     */
-    public function __construct(Component $vcal, $uid=null) {
-
-        if (is_null($uid)) {
-            if ($vcal->name === 'VCALENDAR') {
-                throw new \InvalidArgumentException('If you pass a VCALENDAR object, you must pass a uid argument as well');
-            }
-            $components = array($vcal);
-            $uid = (string)$vcal->uid;
-        } else {
-            $components = $vcal->select('VEVENT');
-        }
-        foreach($components as $component) {
-            if ((string)$component->uid == $uid) {
-                if (isset($component->{'RECURRENCE-ID'})) {
-                    $this->overriddenEvents[$component->DTSTART->getDateTime()->getTimeStamp()] = $component;
-                    $this->overriddenDates[] = $component->{'RECURRENCE-ID'}->getDateTime();
-                } else {
-                    $this->baseEvent = $component;
-                }
-            }
-        }
-
-        ksort($this->overriddenEvents);
-
-        if (!$this->baseEvent) {
-            throw new \InvalidArgumentException('Could not find a base event with uid: ' . $uid);
-        }
-
-        $this->startDate = clone $this->baseEvent->DTSTART->getDateTime();
-
-        $this->endDate = null;
-        if (isset($this->baseEvent->DTEND)) {
-            $this->endDate = clone $this->baseEvent->DTEND->getDateTime();
-        } else {
-            $this->endDate = clone $this->startDate;
-            if (isset($this->baseEvent->DURATION)) {
-                $this->endDate->add(DateTimeParser::parse($this->baseEvent->DURATION->value));
-            } elseif ($this->baseEvent->DTSTART->getDateType()===Property\DateTime::DATE) {
-                $this->endDate->modify('+1 day');
-            }
-        }
-        $this->currentDate = clone $this->startDate;
-
-        $rrule = (string)$this->baseEvent->RRULE;
-
-        $parts = explode(';', $rrule);
-
-        // If no rrule was specified, we create a default setting
-        if (!$rrule) {
-            $this->frequency = 'daily';
-            $this->count = 1;
-        } else foreach($parts as $part) {
-
-            list($key, $value) = explode('=', $part, 2);
-
-            switch(strtoupper($key)) {
-
-                case 'FREQ' :
-                    if (!in_array(
-                        strtolower($value),
-                        array('secondly','minutely','hourly','daily','weekly','monthly','yearly')
-                    )) {
-                        throw new \InvalidArgumentException('Unknown value for FREQ=' . strtoupper($value));
-
-                    }
-                    $this->frequency = strtolower($value);
-                    break;
-
-                case 'UNTIL' :
-                    $this->until = DateTimeParser::parse($value);
-
-                    // In some cases events are generated with an UNTIL=
-                    // parameter before the actual start of the event.
-                    //
-                    // Not sure why this is happening. We assume that the
-                    // intention was that the event only recurs once.
-                    //
-                    // So we are modifying the parameter so our code doesn't
-                    // break.
-                    if($this->until < $this->baseEvent->DTSTART->getDateTime()) {
-                        $this->until = $this->baseEvent->DTSTART->getDateTime();
-                    }
-                    break;
-
-                case 'COUNT' :
-                    $this->count = (int)$value;
-                    break;
-
-                case 'INTERVAL' :
-                    $this->interval = (int)$value;
-                    if ($this->interval < 1) {
-                        throw new \InvalidArgumentException('INTERVAL in RRULE must be a positive integer!');
-                    }
-                    break;
-
-                case 'BYSECOND' :
-                    $this->bySecond = explode(',', $value);
-                    break;
-
-                case 'BYMINUTE' :
-                    $this->byMinute = explode(',', $value);
-                    break;
-
-                case 'BYHOUR' :
-                    $this->byHour = explode(',', $value);
-                    break;
-
-                case 'BYDAY' :
-                    $this->byDay = explode(',', strtoupper($value));
-                    break;
-
-                case 'BYMONTHDAY' :
-                    $this->byMonthDay = explode(',', $value);
-                    break;
-
-                case 'BYYEARDAY' :
-                    $this->byYearDay = explode(',', $value);
-                    break;
-
-                case 'BYWEEKNO' :
-                    $this->byWeekNo = explode(',', $value);
-                    break;
-
-                case 'BYMONTH' :
-                    $this->byMonth = explode(',', $value);
-                    break;
-
-                case 'BYSETPOS' :
-                    $this->bySetPos = explode(',', $value);
-                    break;
-
-                case 'WKST' :
-                    $this->weekStart = strtoupper($value);
-                    break;
-
-            }
-
-        }
-
-        // Parsing exception dates
-        if (isset($this->baseEvent->EXDATE)) {
-            foreach($this->baseEvent->EXDATE as $exDate) {
-
-                foreach(explode(',', (string)$exDate) as $exceptionDate) {
-
-                    $this->exceptionDates[] =
-                        DateTimeParser::parse($exceptionDate, $this->startDate->getTimeZone());
-
-                }
-
-            }
-
-        }
-
-    }
-
-    /**
-     * Returns the current item in the list
-     *
-     * @return DateTime
-     */
-    public function current() {
-
-        if (!$this->valid()) return null;
-        return clone $this->currentDate;
-
-    }
-
-    /**
-     * This method returns the startdate for the current iteration of the
-     * event.
-     *
-     * @return DateTime
-     */
-    public function getDtStart() {
-
-        if (!$this->valid()) return null;
-        return clone $this->currentDate;
-
-    }
-
-    /**
-     * This method returns the enddate for the current iteration of the
-     * event.
-     *
-     * @return DateTime
-     */
-    public function getDtEnd() {
-
-        if (!$this->valid()) return null;
-        $dtEnd = clone $this->currentDate;
-        $dtEnd->add( $this->startDate->diff( $this->endDate ) );
-        return clone $dtEnd;
-
-    }
-
-    /**
-     * Returns a VEVENT object with the updated start and end date.
-     *
-     * Any recurrence information is removed, and this function may return an
-     * 'overridden' event instead.
-     *
-     * This method always returns a cloned instance.
-     *
-     * @return Component\VEvent
-     */
-    public function getEventObject() {
-
-        if ($this->currentOverriddenEvent) {
-            return clone $this->currentOverriddenEvent;
-        }
-        $event = clone $this->baseEvent;
-        unset($event->RRULE);
-        unset($event->EXDATE);
-        unset($event->RDATE);
-        unset($event->EXRULE);
-
-        $event->DTSTART->setDateTime($this->getDTStart(), $event->DTSTART->getDateType());
-        if (isset($event->DTEND)) {
-            $event->DTEND->setDateTime($this->getDtEnd(), $event->DTSTART->getDateType());
-        }
-        if ($this->counter > 0) {
-            $event->{'RECURRENCE-ID'} = (string)$event->DTSTART;
-        }
-
-        return $event;
-
-    }
-
-    /**
-     * Returns the current item number
-     *
-     * @return int
-     */
-    public function key() {
-
-        return $this->counter;
-
-    }
-
-    /**
-     * Whether or not there is a 'next item'
-     *
-     * @return bool
-     */
-    public function valid() {
-
-        if (!is_null($this->count)) {
-            return $this->counter < $this->count;
-        }
-        if (!is_null($this->until) && $this->currentDate > $this->until) {
-
-            // Need to make sure there's no overridden events past the
-            // until date.
-            foreach($this->overriddenEvents as $overriddenEvent) {
-
-                if ($overriddenEvent->DTSTART->getDateTime() >= $this->currentDate) {
-
-                    return true;
-                }
-            }
-            return false;
-        }
-        return true;
-
-    }
-
-    /**
-     * Resets the iterator
-     *
-     * @return void
-     */
-    public function rewind() {
-
-        $this->currentDate = clone $this->startDate;
-        $this->counter = 0;
-
-    }
-
-    /**
-     * This method allows you to quickly go to the next occurrence after the
-     * specified date.
-     *
-     * Note that this checks the current 'endDate', not the 'stardDate'. This
-     * means that if you forward to January 1st, the iterator will stop at the
-     * first event that ends *after* January 1st.
-     *
-     * @param DateTime $dt
-     * @return void
-     */
-    public function fastForward(\DateTime $dt) {
-
-        while($this->valid() && $this->getDTEnd() <= $dt) {
-            $this->next();
-        }
-
-    }
-
-    /**
-     * Returns true if this recurring event never ends.
-     *
-     * @return bool
-     */
-    public function isInfinite() {
-
-        return !$this->count && !$this->until;
-
-    }
-
-    /**
-     * Goes on to the next iteration
-     *
-     * @return void
-     */
-    public function next() {
-
-        $previousStamp = $this->currentDate->getTimeStamp();
-
-        // Finding the next overridden event in line, and storing that for
-        // later use.
-        $overriddenEvent = null;
-        $overriddenDate = null;
-        $this->currentOverriddenEvent = null;
-
-        foreach($this->overriddenEvents as $index=>$event) {
-            if ($index > $previousStamp) {
-                $overriddenEvent = $event;
-                $overriddenDate = clone $event->DTSTART->getDateTime();
-                break;
-            }
-        }
-
-        // If we have a stored 'next date', we will use that.
-        if ($this->nextDate) {
-            if (!$overriddenDate || $this->nextDate < $overriddenDate) {
-                $this->currentDate = $this->nextDate;
-                $currentStamp = $this->currentDate->getTimeStamp();
-                $this->nextDate = null;
-            } else {
-                $this->currentDate = clone $overriddenDate;
-                $this->currentOverriddenEvent = $overriddenEvent;
-            }
-            $this->counter++;
-            return;
-        }
-
-        while(true) {
-
-            // Otherwise, we find the next event in the normal RRULE
-            // sequence.
-            switch($this->frequency) {
-
-                case 'hourly' :
-                    $this->nextHourly();
-                    break;
-
-                case 'daily' :
-                    $this->nextDaily();
-                    break;
-
-                case 'weekly' :
-                    $this->nextWeekly();
-                    break;
-
-                case 'monthly' :
-                    $this->nextMonthly();
-                    break;
-
-                case 'yearly' :
-                    $this->nextYearly();
-                    break;
-
-            }
-            $currentStamp = $this->currentDate->getTimeStamp();
-
-
-            // Checking exception dates
-            foreach($this->exceptionDates as $exceptionDate) {
-                if ($this->currentDate == $exceptionDate) {
-                    $this->counter++;
-                    continue 2;
-                }
-            }
-            foreach($this->overriddenDates as $check) {
-                if ($this->currentDate == $check) {
-                    continue 2;
-                }
-            }
-            break;
-
-        }
-
-
-
-        // Is the date we have actually higher than the next overiddenEvent?
-        if ($overriddenDate && $this->currentDate > $overriddenDate) {
-            $this->nextDate = clone $this->currentDate;
-            $this->currentDate = clone $overriddenDate;
-            $this->currentOverriddenEvent = $overriddenEvent;
-            $this->handledOverridden++;
-        }
-        $this->counter++;
-
-
-        /*
-         * If we have overridden events left in the queue, but our counter is
-         * running out, we should grab one of those.
-         */
-        if (!is_null($overriddenEvent) && !is_null($this->count) && count($this->overriddenEvents) - $this->handledOverridden >= ($this->count - $this->counter)) {
-
-            $this->currentOverriddenEvent = $overriddenEvent;
-            $this->currentDate = clone $overriddenDate;
-            $this->handledOverridden++;
-
-        }
-
-    }
-
-    /**
-     * Does the processing for advancing the iterator for hourly frequency.
-     *
-     * @return void
-     */
-    protected function nextHourly() {
-
-        if (!$this->byHour) {
-            $this->currentDate->modify('+' . $this->interval . ' hours');
-            return;
-        }
-    }
-
-    /**
-     * Does the processing for advancing the iterator for daily frequency.
-     *
-     * @return void
-     */
-    protected function nextDaily() {
-
-        if (!$this->byHour && !$this->byDay) {
-            $this->currentDate->modify('+' . $this->interval . ' days');
-            return;
-        }
-
-        if (isset($this->byHour)) {
-            $recurrenceHours = $this->getHours();
-        }
-
-        if (isset($this->byDay)) {
-            $recurrenceDays = $this->getDays();
-        }
-
-        do {
-
-            if ($this->byHour) {
-                if ($this->currentDate->format('G') == '23') {
-                    // to obey the interval rule
-                    $this->currentDate->modify('+' . $this->interval-1 . ' days');
-                }
-
-                $this->currentDate->modify('+1 hours');
-
-            } else {
-                $this->currentDate->modify('+' . $this->interval . ' days');
-
-            }
-
-            // Current day of the week
-            $currentDay = $this->currentDate->format('w');
-
-            // Current hour of the day
-            $currentHour = $this->currentDate->format('G');
-
-        } while (($this->byDay && !in_array($currentDay, $recurrenceDays)) || ($this->byHour && !in_array($currentHour, $recurrenceHours)));
-
-    }
-
-    /**
-     * Does the processing for advancing the iterator for weekly frequency.
-     *
-     * @return void
-     */
-    protected function nextWeekly() {
-
-        if (!$this->byHour && !$this->byDay) {
-            $this->currentDate->modify('+' . $this->interval . ' weeks');
-            return;
-        }
-
-        if ($this->byHour) {
-            $recurrenceHours = $this->getHours();
-        }
-
-        if ($this->byDay) {
-            $recurrenceDays = $this->getDays();
-        }
-
-        // First day of the week:
-        $firstDay = $this->dayMap[$this->weekStart];
-
-        do {
-
-            if ($this->byHour) {
-                $this->currentDate->modify('+1 hours');
-            } else {
-                $this->currentDate->modify('+1 days');
-            }
-
-            // Current day of the week
-            $currentDay = (int) $this->currentDate->format('w');
-
-            // Current hour of the day
-            $currentHour = (int) $this->currentDate->format('G');
-
-            // We need to roll over to the next week
-            if ($currentDay === $firstDay && (!$this->byHour || $currentHour == '0')) {
-                $this->currentDate->modify('+' . $this->interval-1 . ' weeks');
-
-                // We need to go to the first day of this week, but only if we
-                // are not already on this first day of this week.
-                if($this->currentDate->format('w') != $firstDay) {
-                    $this->currentDate->modify('last ' . $this->dayNames[$this->dayMap[$this->weekStart]]);
-                }
-            }
-
-            // We have a match
-        } while (($this->byDay && !in_array($currentDay, $recurrenceDays)) || ($this->byHour && !in_array($currentHour, $recurrenceHours)));
-    }
-
-    /**
-     * Does the processing for advancing the iterator for monthly frequency.
-     *
-     * @return void
-     */
-    protected function nextMonthly() {
-
-        $currentDayOfMonth = $this->currentDate->format('j');
-        if (!$this->byMonthDay && !$this->byDay) {
-
-            // If the current day is higher than the 28th, rollover can
-            // occur to the next month. We Must skip these invalid
-            // entries.
-            if ($currentDayOfMonth < 29) {
-                $this->currentDate->modify('+' . $this->interval . ' months');
-            } else {
-                $increase = 0;
-                do {
-                    $increase++;
-                    $tempDate = clone $this->currentDate;
-                    $tempDate->modify('+ ' . ($this->interval*$increase) . ' months');
-                } while ($tempDate->format('j') != $currentDayOfMonth);
-                $this->currentDate = $tempDate;
-            }
-            return;
-        }
-
-        while(true) {
-
-            $occurrences = $this->getMonthlyOccurrences();
-
-            foreach($occurrences as $occurrence) {
-
-                // The first occurrence thats higher than the current
-                // day of the month wins.
-                if ($occurrence > $currentDayOfMonth) {
-                    break 2;
-                }
-
-            }
-
-            // If we made it all the way here, it means there were no
-            // valid occurrences, and we need to advance to the next
-            // month.
-            $this->currentDate->modify('first day of this month');
-            $this->currentDate->modify('+ ' . $this->interval . ' months');
-
-            // This goes to 0 because we need to start counting at hte
-            // beginning.
-            $currentDayOfMonth = 0;
-
-        }
-
-        $this->currentDate->setDate($this->currentDate->format('Y'), $this->currentDate->format('n'), $occurrence);
-
-    }
-
-    /**
-     * Does the processing for advancing the iterator for yearly frequency.
-     *
-     * @return void
-     */
-    protected function nextYearly() {
-
-        $currentMonth = $this->currentDate->format('n');
-        $currentYear = $this->currentDate->format('Y');
-        $currentDayOfMonth = $this->currentDate->format('j');
-
-        // No sub-rules, so we just advance by year
-        if (!$this->byMonth) {
-
-            // Unless it was a leap day!
-            if ($currentMonth==2 && $currentDayOfMonth==29) {
-
-                $counter = 0;
-                do {
-                    $counter++;
-                    // Here we increase the year count by the interval, until
-                    // we hit a date that's also in a leap year.
-                    //
-                    // We could just find the next interval that's dividable by
-                    // 4, but that would ignore the rule that there's no leap
-                    // year every year that's dividable by a 100, but not by
-                    // 400. (1800, 1900, 2100). So we just rely on the datetime
-                    // functions instead.
-                    $nextDate = clone $this->currentDate;
-                    $nextDate->modify('+ ' . ($this->interval*$counter) . ' years');
-                } while ($nextDate->format('n')!=2);
-                $this->currentDate = $nextDate;
-
-                return;
-
-            }
-
-            // The easiest form
-            $this->currentDate->modify('+' . $this->interval . ' years');
-            return;
-
-        }
-
-        $currentMonth = $this->currentDate->format('n');
-        $currentYear = $this->currentDate->format('Y');
-        $currentDayOfMonth = $this->currentDate->format('j');
-
-        $advancedToNewMonth = false;
-
-        // If we got a byDay or getMonthDay filter, we must first expand
-        // further.
-        if ($this->byDay || $this->byMonthDay) {
-
-            while(true) {
-
-                $occurrences = $this->getMonthlyOccurrences();
-
-                foreach($occurrences as $occurrence) {
-
-                    // The first occurrence that's higher than the current
-                    // day of the month wins.
-                    // If we advanced to the next month or year, the first
-                    // occurrence is always correct.
-                    if ($occurrence > $currentDayOfMonth || $advancedToNewMonth) {
-                        break 2;
-                    }
-
-                }
-
-                // If we made it here, it means we need to advance to
-                // the next month or year.
-                $currentDayOfMonth = 1;
-                $advancedToNewMonth = true;
-                do {
-
-                    $currentMonth++;
-                    if ($currentMonth>12) {
-                        $currentYear+=$this->interval;
-                        $currentMonth = 1;
-                    }
-                } while (!in_array($currentMonth, $this->byMonth));
-
-                $this->currentDate->setDate($currentYear, $currentMonth, $currentDayOfMonth);
-
-            }
-
-            // If we made it here, it means we got a valid occurrence
-            $this->currentDate->setDate($currentYear, $currentMonth, $occurrence);
-            return;
-
-        } else {
-
-            // These are the 'byMonth' rules, if there are no byDay or
-            // byMonthDay sub-rules.
-            do {
-
-                $currentMonth++;
-                if ($currentMonth>12) {
-                    $currentYear+=$this->interval;
-                    $currentMonth = 1;
-                }
-            } while (!in_array($currentMonth, $this->byMonth));
-            $this->currentDate->setDate($currentYear, $currentMonth, $currentDayOfMonth);
-
-            return;
-
-        }
-
-    }
-
-    /**
-     * Returns all the occurrences for a monthly frequency with a 'byDay' or
-     * 'byMonthDay' expansion for the current month.
-     *
-     * The returned list is an array of integers with the day of month (1-31).
-     *
-     * @return array
-     */
-    protected function getMonthlyOccurrences() {
-
-        $startDate = clone $this->currentDate;
-
-        $byDayResults = array();
-
-        // Our strategy is to simply go through the byDays, advance the date to
-        // that point and add it to the results.
-        if ($this->byDay) foreach($this->byDay as $day) {
-
-            $dayName = $this->dayNames[$this->dayMap[substr($day,-2)]];
-
-            // Dayname will be something like 'wednesday'. Now we need to find
-            // all wednesdays in this month.
-            $dayHits = array();
-
-            $checkDate = clone $startDate;
-            $checkDate->modify('first day of this month');
-            $checkDate->modify($dayName);
-
-            do {
-                $dayHits[] = $checkDate->format('j');
-                $checkDate->modify('next ' . $dayName);
-            } while ($checkDate->format('n') === $startDate->format('n'));
-
-            // So now we have 'all wednesdays' for month. It is however
-            // possible that the user only really wanted the 1st, 2nd or last
-            // wednesday.
-            if (strlen($day)>2) {
-                $offset = (int)substr($day,0,-2);
-
-                if ($offset>0) {
-                    // It is possible that the day does not exist, such as a
-                    // 5th or 6th wednesday of the month.
-                    if (isset($dayHits[$offset-1])) {
-                        $byDayResults[] = $dayHits[$offset-1];
-                    }
-                } else {
-
-                    // if it was negative we count from the end of the array
-                    $byDayResults[] = $dayHits[count($dayHits) + $offset];
-                }
-            } else {
-                // There was no counter (first, second, last wednesdays), so we
-                // just need to add the all to the list).
-                $byDayResults = array_merge($byDayResults, $dayHits);
-
-            }
-
-        }
-
-        $byMonthDayResults = array();
-        if ($this->byMonthDay) foreach($this->byMonthDay as $monthDay) {
-
-            // Removing values that are out of range for this month
-            if ($monthDay > $startDate->format('t') ||
-                $monthDay < 0-$startDate->format('t')) {
-                    continue;
-            }
-            if ($monthDay>0) {
-                $byMonthDayResults[] = $monthDay;
-            } else {
-                // Negative values
-                $byMonthDayResults[] = $startDate->format('t') + 1 + $monthDay;
-            }
-        }
-
-        // If there was just byDay or just byMonthDay, they just specify our
-        // (almost) final list. If both were provided, then byDay limits the
-        // list.
-        if ($this->byMonthDay && $this->byDay) {
-            $result = array_intersect($byMonthDayResults, $byDayResults);
-        } elseif ($this->byMonthDay) {
-            $result = $byMonthDayResults;
-        } else {
-            $result = $byDayResults;
-        }
-        $result = array_unique($result);
-        sort($result, SORT_NUMERIC);
-
-        // The last thing that needs checking is the BYSETPOS. If it's set, it
-        // means only certain items in the set survive the filter.
-        if (!$this->bySetPos) {
-            return $result;
-        }
-
-        $filteredResult = array();
-        foreach($this->bySetPos as $setPos) {
-
-            if ($setPos<0) {
-                $setPos = count($result)-($setPos+1);
-            }
-            if (isset($result[$setPos-1])) {
-                $filteredResult[] = $result[$setPos-1];
-            }
-        }
-
-        sort($filteredResult, SORT_NUMERIC);
-        return $filteredResult;
-
-    }
-
-    protected function getHours()
-    {
-        $recurrenceHours = array();
-        foreach($this->byHour as $byHour) {
-            $recurrenceHours[] = $byHour;
-        }
-
-        return $recurrenceHours;
-    }
-
-    protected function getDays()
-    {
-        $recurrenceDays = array();
-        foreach($this->byDay as $byDay) {
-
-            // The day may be preceeded with a positive (+n) or
-            // negative (-n) integer. However, this does not make
-            // sense in 'weekly' so we ignore it here.
-            $recurrenceDays[] = $this->dayMap[substr($byDay,-2)];
-
-        }
-
-        return $recurrenceDays;
-    }
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/ICalendar.php b/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/ICalendar.php
deleted file mode 100644
index 657cfb810..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/ICalendar.php
+++ /dev/null
@@ -1,111 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Splitter;
-
-use Sabre\VObject;
-
-/**
- * Splitter
- *
- * This class is responsible for splitting up iCalendar objects.
- *
- * This class expects a single VCALENDAR object with one or more
- * calendar-objects inside. Objects with identical UID's will be combined into
- * a single object.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Dominik Tobschall
- * @author Armin Hackmann
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class ICalendar implements SplitterInterface {
-
-    /**
-     * Timezones
-     *
-     * @var array
-     */
-    protected $vtimezones = array();
-
-    /**
-     * iCalendar objects
-     *
-     * @var array
-     */
-    protected $objects = array();
-
-    /**
-     * Constructor
-     *
-     * The splitter should receive an readable file stream as it's input.
-     *
-     * @param resource $input
-     */
-    public function __construct($input) {
-
-        $data = VObject\Reader::read(stream_get_contents($input));
-        $vtimezones = array();
-        $components = array();
-
-        foreach($data->children as $component) {
-            if (!$component instanceof VObject\Component) {
-                continue;
-            }
-
-            // Get all timezones
-            if ($component->name === 'VTIMEZONE') {
-                $this->vtimezones[(string)$component->TZID] = $component;
-                continue;
-            }
-
-            // Get component UID for recurring Events search
-            if($component->UID) {
-                $uid = (string)$component->UID;
-            } else {
-                // Generating a random UID
-                $uid = sha1(microtime()) . '-vobjectimport';
-            }
-
-            // Take care of recurring events
-            if (!array_key_exists($uid, $this->objects)) {
-                $this->objects[$uid] = VObject\Component::create('VCALENDAR');
-            }
-
-            $this->objects[$uid]->add(clone $component);
-        }
-
-    }
-
-    /**
-     * Every time getNext() is called, a new object will be parsed, until we
-     * hit the end of the stream.
-     *
-     * When the end is reached, null will be returned.
-     *
-     * @return Sabre\VObject\Component|null
-     */
-    public function getNext() {
-
-        if($object=array_shift($this->objects)) {
-
-            // create our baseobject
-            $object->version = '2.0';
-            $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
-            $object->calscale = 'GREGORIAN';
-
-            // add vtimezone information to obj (if we have it)
-            foreach ($this->vtimezones as $vtimezone) {
-                $object->add($vtimezone);
-            }
-
-            return $object;
-
-        } else {
-
-            return null;
-
-        }
-
-   }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/SplitterInterface.php b/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/SplitterInterface.php
deleted file mode 100644
index c0126883a..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/SplitterInterface.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Splitter;
-
-/**
- * VObject splitter
- *
- * The splitter is responsible for reading a large vCard or iCalendar object,
- * and splitting it into multiple objects.
- *
- * This is for example for Card and CalDAV, which require every event and vcard
- * to exist in their own objects, instead of one large one.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Dominik Tobschall
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-interface SplitterInterface {
-
-    /**
-     * Constructor
-     *
-     * The splitter should receive an readable file stream as it's input.
-     *
-     * @param resource $input
-     */
-    function __construct($input);
-
-    /**
-     * Every time getNext() is called, a new object will be parsed, until we
-     * hit the end of the stream.
-     *
-     * When the end is reached, null will be returned.
-     *
-     * @return Sabre\VObject\Component|null
-     */
-    function getNext();
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/VCard.php b/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/VCard.php
deleted file mode 100644
index 7a8718c00..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Splitter/VCard.php
+++ /dev/null
@@ -1,76 +0,0 @@
-<?php
-
-namespace Sabre\VObject\Splitter;
-
-use Sabre\VObject;
-
-/**
- * Splitter
- *
- * This class is responsible for splitting up VCard objects.
- *
- * It is assumed that the input stream contains 1 or more VCARD objects. This
- * class checks for BEGIN:VCARD and END:VCARD and parses each encountered
- * component individually.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Dominik Tobschall
- * @author Armin Hackmann
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class VCard implements SplitterInterface {
-
-    /**
-     * File handle
-     *
-     * @var resource
-     */
-    protected $input;
-
-    /**
-     * Constructor
-     *
-     * The splitter should receive an readable file stream as it's input.
-     *
-     * @param resource $input
-     */
-    public function __construct($input) {
-
-        $this->input = $input;
-
-    }
-
-    /**
-     * Every time getNext() is called, a new object will be parsed, until we
-     * hit the end of the stream.
-     *
-     * When the end is reached, null will be returned.
-     *
-     * @return Sabre\VObject\Component|null
-     */
-    public function getNext() {
-
-        $vcard = '';
-
-        do {
-
-            if (feof($this->input)) {
-                return false;
-            }
-
-            $line = fgets($this->input);
-            $vcard .= $line;
-
-        } while(strtoupper(substr($line,0,4))!=="END:");
-
-        $object = VObject\Reader::read($vcard);
-
-        if($object->name !== 'VCARD') {
-            throw new \InvalidArgumentException("Thats no vCard!", 1);
-        }
-
-        return $object;
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/StringUtil.php b/vendor/sabre/vobject/lib/Sabre/VObject/StringUtil.php
deleted file mode 100644
index ea88e1e86..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/StringUtil.php
+++ /dev/null
@@ -1,61 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * Useful utilities for working with various strings.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class StringUtil {
-
-    /**
-     * Returns true or false depending on if a string is valid UTF-8
-     *
-     * @param string $str
-     * @return bool
-     */
-    static function isUTF8($str) {
-
-        // First check.. mb_check_encoding
-        if (!mb_check_encoding($str, 'UTF-8')) {
-            return false;
-        }
-
-        // Control characters
-        if (preg_match('%(?:[\x00-\x08\x0B-\x0C\x0E\x0F])%', $str)) {
-            return false;
-        }
-
-        return true;
-
-    }
-
-    /**
-     * This method tries its best to convert the input string to UTF-8.
-     *
-     * Currently only ISO-5991-1 input and UTF-8 input is supported, but this
-     * may be expanded upon if we receive other examples.
-     *
-     * @param string $str
-     * @return string
-     */
-    static function convertToUTF8($str) {
-
-        $encoding = mb_detect_encoding($str , array('UTF-8','ISO-8859-1'), true);
-
-        if ($encoding === 'ISO-8859-1') {
-            $newStr = utf8_encode($str);
-        } else {
-            $newStr = $str;
-        }
-
-        // Removing any control characters
-        return (preg_replace('%(?:[\x00-\x08\x0B-\x0C\x0E\x0F])%', '', $newStr));
-
-    }
-
-}
-
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/TimeZoneUtil.php b/vendor/sabre/vobject/lib/Sabre/VObject/TimeZoneUtil.php
deleted file mode 100644
index c009a6af0..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/TimeZoneUtil.php
+++ /dev/null
@@ -1,527 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * Time zone name translation
- *
- * This file translates well-known time zone names into "Olson database" time zone names.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Frank Edelhaeuser (fedel@users.sourceforge.net)
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class TimeZoneUtil {
-
-    public static $map = array(
-
-        // from http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/zone_tzid.html
-        // snapshot taken on 2012/01/16
-
-        // windows
-        'AUS Central Standard Time'=>'Australia/Darwin',
-        'AUS Eastern Standard Time'=>'Australia/Sydney',
-        'Afghanistan Standard Time'=>'Asia/Kabul',
-        'Alaskan Standard Time'=>'America/Anchorage',
-        'Arab Standard Time'=>'Asia/Riyadh',
-        'Arabian Standard Time'=>'Asia/Dubai',
-        'Arabic Standard Time'=>'Asia/Baghdad',
-        'Argentina Standard Time'=>'America/Buenos_Aires',
-        'Armenian Standard Time'=>'Asia/Yerevan',
-        'Atlantic Standard Time'=>'America/Halifax',
-        'Azerbaijan Standard Time'=>'Asia/Baku',
-        'Azores Standard Time'=>'Atlantic/Azores',
-        'Bangladesh Standard Time'=>'Asia/Dhaka',
-        'Canada Central Standard Time'=>'America/Regina',
-        'Cape Verde Standard Time'=>'Atlantic/Cape_Verde',
-        'Caucasus Standard Time'=>'Asia/Yerevan',
-        'Cen. Australia Standard Time'=>'Australia/Adelaide',
-        'Central America Standard Time'=>'America/Guatemala',
-        'Central Asia Standard Time'=>'Asia/Almaty',
-        'Central Brazilian Standard Time'=>'America/Cuiaba',
-        'Central Europe Standard Time'=>'Europe/Budapest',
-        'Central European Standard Time'=>'Europe/Warsaw',
-        'Central Pacific Standard Time'=>'Pacific/Guadalcanal',
-        'Central Standard Time'=>'America/Chicago',
-        'Central Standard Time (Mexico)'=>'America/Mexico_City',
-        'China Standard Time'=>'Asia/Shanghai',
-        'Dateline Standard Time'=>'Etc/GMT+12',
-        'E. Africa Standard Time'=>'Africa/Nairobi',
-        'E. Australia Standard Time'=>'Australia/Brisbane',
-        'E. Europe Standard Time'=>'Europe/Minsk',
-        'E. South America Standard Time'=>'America/Sao_Paulo',
-        'Eastern Standard Time'=>'America/New_York',
-        'Egypt Standard Time'=>'Africa/Cairo',
-        'Ekaterinburg Standard Time'=>'Asia/Yekaterinburg',
-        'FLE Standard Time'=>'Europe/Kiev',
-        'Fiji Standard Time'=>'Pacific/Fiji',
-        'GMT Standard Time'=>'Europe/London',
-        'GTB Standard Time'=>'Europe/Istanbul',
-        'Georgian Standard Time'=>'Asia/Tbilisi',
-        'Greenland Standard Time'=>'America/Godthab',
-        'Greenwich Standard Time'=>'Atlantic/Reykjavik',
-        'Hawaiian Standard Time'=>'Pacific/Honolulu',
-        'India Standard Time'=>'Asia/Calcutta',
-        'Iran Standard Time'=>'Asia/Tehran',
-        'Israel Standard Time'=>'Asia/Jerusalem',
-        'Jordan Standard Time'=>'Asia/Amman',
-        'Kamchatka Standard Time'=>'Asia/Kamchatka',
-        'Korea Standard Time'=>'Asia/Seoul',
-        'Magadan Standard Time'=>'Asia/Magadan',
-        'Mauritius Standard Time'=>'Indian/Mauritius',
-        'Mexico Standard Time'=>'America/Mexico_City',
-        'Mexico Standard Time 2'=>'America/Chihuahua',
-        'Mid-Atlantic Standard Time'=>'Etc/GMT-2',
-        'Middle East Standard Time'=>'Asia/Beirut',
-        'Montevideo Standard Time'=>'America/Montevideo',
-        'Morocco Standard Time'=>'Africa/Casablanca',
-        'Mountain Standard Time'=>'America/Denver',
-        'Mountain Standard Time (Mexico)'=>'America/Chihuahua',
-        'Myanmar Standard Time'=>'Asia/Rangoon',
-        'N. Central Asia Standard Time'=>'Asia/Novosibirsk',
-        'Namibia Standard Time'=>'Africa/Windhoek',
-        'Nepal Standard Time'=>'Asia/Katmandu',
-        'New Zealand Standard Time'=>'Pacific/Auckland',
-        'Newfoundland Standard Time'=>'America/St_Johns',
-        'North Asia East Standard Time'=>'Asia/Irkutsk',
-        'North Asia Standard Time'=>'Asia/Krasnoyarsk',
-        'Pacific SA Standard Time'=>'America/Santiago',
-        'Pacific Standard Time'=>'America/Los_Angeles',
-        'Pacific Standard Time (Mexico)'=>'America/Santa_Isabel',
-        'Pakistan Standard Time'=>'Asia/Karachi',
-        'Paraguay Standard Time'=>'America/Asuncion',
-        'Romance Standard Time'=>'Europe/Paris',
-        'Russian Standard Time'=>'Europe/Moscow',
-        'SA Eastern Standard Time'=>'America/Cayenne',
-        'SA Pacific Standard Time'=>'America/Bogota',
-        'SA Western Standard Time'=>'America/La_Paz',
-        'SE Asia Standard Time'=>'Asia/Bangkok',
-        'Samoa Standard Time'=>'Pacific/Apia',
-        'Singapore Standard Time'=>'Asia/Singapore',
-        'South Africa Standard Time'=>'Africa/Johannesburg',
-        'Sri Lanka Standard Time'=>'Asia/Colombo',
-        'Syria Standard Time'=>'Asia/Damascus',
-        'Taipei Standard Time'=>'Asia/Taipei',
-        'Tasmania Standard Time'=>'Australia/Hobart',
-        'Tokyo Standard Time'=>'Asia/Tokyo',
-        'Tonga Standard Time'=>'Pacific/Tongatapu',
-        'US Eastern Standard Time'=>'America/Indianapolis',
-        'US Mountain Standard Time'=>'America/Phoenix',
-        'UTC+12'=>'Etc/GMT-12',
-        'UTC-02'=>'Etc/GMT+2',
-        'UTC-11'=>'Etc/GMT+11',
-        'Ulaanbaatar Standard Time'=>'Asia/Ulaanbaatar',
-        'Venezuela Standard Time'=>'America/Caracas',
-        'Vladivostok Standard Time'=>'Asia/Vladivostok',
-        'W. Australia Standard Time'=>'Australia/Perth',
-        'W. Central Africa Standard Time'=>'Africa/Lagos',
-        'W. Europe Standard Time'=>'Europe/Berlin',
-        'West Asia Standard Time'=>'Asia/Tashkent',
-        'West Pacific Standard Time'=>'Pacific/Port_Moresby',
-        'Yakutsk Standard Time'=>'Asia/Yakutsk',
-
-        // Microsoft exchange timezones
-        // Source:
-        // http://msdn.microsoft.com/en-us/library/ms988620%28v=exchg.65%29.aspx
-        //
-        // Correct timezones deduced with help from:
-        // http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
-        'Universal Coordinated Time' => 'UTC',
-        'Casablanca, Monrovia' => 'Africa/Casablanca',
-        'Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London' => 'Europe/Lisbon',
-        'Greenwich Mean Time; Dublin, Edinburgh, London' =>  'Europe/London',
-        'Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
-        'Belgrade, Pozsony, Budapest, Ljubljana, Prague' => 'Europe/Prague',
-        'Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
-        'Paris, Madrid, Brussels, Copenhagen' => 'Europe/Paris',
-        'Prague, Central Europe' => 'Europe/Prague',
-        'Sarajevo, Skopje, Sofija, Vilnius, Warsaw, Zagreb' => 'Europe/Sarajevo',
-        'West Central Africa' => 'Africa/Luanda', // This was a best guess
-        'Athens, Istanbul, Minsk' => 'Europe/Athens',
-        'Bucharest' => 'Europe/Bucharest',
-        'Cairo' => 'Africa/Cairo',
-        'Harare, Pretoria' => 'Africa/Harare',
-        'Helsinki, Riga, Tallinn' => 'Europe/Helsinki',
-        'Israel, Jerusalem Standard Time' => 'Asia/Jerusalem',
-        'Baghdad' => 'Asia/Baghdad',
-        'Arab, Kuwait, Riyadh' => 'Asia/Kuwait',
-        'Moscow, St. Petersburg, Volgograd' => 'Europe/Moscow',
-        'East Africa, Nairobi' => 'Africa/Nairobi',
-        'Tehran' => 'Asia/Tehran',
-        'Abu Dhabi, Muscat' => 'Asia/Muscat', // Best guess
-        'Baku, Tbilisi, Yerevan' => 'Asia/Baku',
-        'Kabul' => 'Asia/Kabul',
-        'Ekaterinburg' => 'Asia/Yekaterinburg',
-        'Islamabad, Karachi, Tashkent' => 'Asia/Karachi',
-        'Kolkata, Chennai, Mumbai, New Delhi, India Standard Time' => 'Asia/Calcutta',
-        'Kathmandu, Nepal' => 'Asia/Kathmandu',
-        'Almaty, Novosibirsk, North Central Asia' => 'Asia/Almaty',
-        'Astana, Dhaka' => 'Asia/Dhaka',
-        'Sri Jayawardenepura, Sri Lanka' => 'Asia/Colombo',
-        'Rangoon' => 'Asia/Rangoon',
-        'Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
-        'Krasnoyarsk' => 'Asia/Krasnoyarsk',
-        'Beijing, Chongqing, Hong Kong SAR, Urumqi' => 'Asia/Shanghai',
-        'Irkutsk, Ulaan Bataar' => 'Asia/Irkutsk',
-        'Kuala Lumpur, Singapore' => 'Asia/Singapore',
-        'Perth, Western Australia' => 'Australia/Perth',
-        'Taipei' => 'Asia/Taipei',
-        'Osaka, Sapporo, Tokyo' => 'Asia/Tokyo',
-        'Seoul, Korea Standard time' => 'Asia/Seoul',
-        'Yakutsk' => 'Asia/Yakutsk',
-        'Adelaide, Central Australia' => 'Australia/Adelaide',
-        'Darwin' => 'Australia/Darwin',
-        'Brisbane, East Australia' => 'Australia/Brisbane',
-        'Canberra, Melbourne, Sydney, Hobart (year 2000 only)' => 'Australia/Sydney',
-        'Guam, Port Moresby' => 'Pacific/Guam',
-        'Hobart, Tasmania' => 'Australia/Hobart',
-        'Vladivostok' => 'Asia/Vladivostok',
-        'Magadan, Solomon Is., New Caledonia' => 'Asia/Magadan',
-        'Auckland, Wellington' => 'Pacific/Auckland',
-        'Fiji Islands, Kamchatka, Marshall Is.' => 'Pacific/Fiji',
-        'Nuku\'alofa, Tonga' => 'Pacific/Tongatapu',
-        'Azores' => 'Atlantic/Azores',
-        'Cape Verde Is.' => 'Atlantic/Cape_Verde',
-        'Mid-Atlantic' => 'America/Noronha',
-        'Brasilia' => 'America/Sao_Paulo', // Best guess
-        'Buenos Aires' => 'America/Argentina/Buenos_Aires',
-        'Greenland' => 'America/Godthab',
-        'Newfoundland' => 'America/St_Johns',
-        'Atlantic Time (Canada)' => 'America/Halifax',
-        'Caracas, La Paz' => 'America/Caracas',
-        'Santiago' => 'America/Santiago',
-        'Bogota, Lima, Quito' => 'America/Bogota',
-        'Eastern Time (US & Canada)' => 'America/New_York',
-        'Indiana (East)' => 'America/Indiana/Indianapolis',
-        'Central America' => 'America/Guatemala',
-        'Central Time (US & Canada)' => 'America/Chicago',
-        'Mexico City, Tegucigalpa' => 'America/Mexico_City',
-        'Saskatchewan' => 'America/Edmonton',
-        'Arizona' => 'America/Phoenix',
-        'Mountain Time (US & Canada)' => 'America/Denver', // Best guess
-        'Pacific Time (US & Canada); Tijuana' => 'America/Los_Angeles', // Best guess
-        'Alaska' => 'America/Anchorage',
-        'Hawaii' => 'Pacific/Honolulu',
-        'Midway Island, Samoa' => 'Pacific/Midway',
-        'Eniwetok, Kwajalein, Dateline Time' => 'Pacific/Kwajalein',
-
-        // The following list are timezone names that could be generated by
-        // Lotus / Domino
-        'Dateline'               => 'Etc/GMT-12',
-        'Samoa'                  => 'Pacific/Apia',
-        'Hawaiian'               => 'Pacific/Honolulu',
-        'Alaskan'                => 'America/Anchorage',
-        'Pacific'                => 'America/Los_Angeles',
-        'Pacific Standard Time'  => 'America/Los_Angeles',
-        'Mexico Standard Time 2' => 'America/Chihuahua',
-        'Mountain'               => 'America/Denver',
-        'Mountain Standard Time' => 'America/Chihuahua',
-        'US Mountain'            => 'America/Phoenix',
-        'Canada Central'         => 'America/Edmonton',
-        'Central America'        => 'America/Guatemala',
-        'Central'                => 'America/Chicago',
-        'Central Standard Time'  => 'America/Mexico_City',
-        'Mexico'                 => 'America/Mexico_City',
-        'Eastern'                => 'America/New_York',
-        'SA Pacific'             => 'America/Bogota',
-        'US Eastern'             => 'America/Indiana/Indianapolis',
-        'Venezuela'              => 'America/Caracas',
-        'Atlantic'               => 'America/Halifax',
-        'Central Brazilian'      => 'America/Manaus',
-        'Pacific SA'             => 'America/Santiago',
-        'SA Western'             => 'America/La_Paz',
-        'Newfoundland'           => 'America/St_Johns',
-        'Argentina'              => 'America/Argentina/Buenos_Aires',
-        'E. South America'       => 'America/Belem',
-        'Greenland'              => 'America/Godthab',
-        'Montevideo'             => 'America/Montevideo',
-        'SA Eastern'             => 'America/Belem',
-        'Mid-Atlantic'           => 'Etc/GMT-2',
-        'Azores'                 => 'Atlantic/Azores',
-        'Cape Verde'             => 'Atlantic/Cape_Verde',
-        'Greenwich'              => 'Atlantic/Reykjavik', // No I'm serious.. Greenwich is not GMT.
-        'Morocco'                => 'Africa/Casablanca',
-        'Central Europe'         => 'Europe/Prague',
-        'Central European'       => 'Europe/Sarajevo',
-        'Romance'                => 'Europe/Paris',
-        'W. Central Africa'      => 'Africa/Lagos', // Best guess
-        'W. Europe'              => 'Europe/Amsterdam',
-        'E. Europe'              => 'Europe/Minsk',
-        'Egypt'                  => 'Africa/Cairo',
-        'FLE'                    => 'Europe/Helsinki',
-        'GTB'                    => 'Europe/Athens',
-        'Israel'                 => 'Asia/Jerusalem',
-        'Jordan'                 => 'Asia/Amman',
-        'Middle East'            => 'Asia/Beirut',
-        'Namibia'                => 'Africa/Windhoek',
-        'South Africa'           => 'Africa/Harare',
-        'Arab'                   => 'Asia/Kuwait',
-        'Arabic'                 => 'Asia/Baghdad',
-        'E. Africa'              => 'Africa/Nairobi',
-        'Georgian'               => 'Asia/Tbilisi',
-        'Russian'                => 'Europe/Moscow',
-        'Iran'                   => 'Asia/Tehran',
-        'Arabian'                => 'Asia/Muscat',
-        'Armenian'               => 'Asia/Yerevan',
-        'Azerbijan'              => 'Asia/Baku',
-        'Caucasus'               => 'Asia/Yerevan',
-        'Mauritius'              => 'Indian/Mauritius',
-        'Afghanistan'            => 'Asia/Kabul',
-        'Ekaterinburg'           => 'Asia/Yekaterinburg',
-        'Pakistan'               => 'Asia/Karachi',
-        'West Asia'              => 'Asia/Tashkent',
-        'India'                  => 'Asia/Calcutta',
-        'Sri Lanka'              => 'Asia/Colombo',
-        'Nepal'                  => 'Asia/Kathmandu',
-        'Central Asia'           => 'Asia/Dhaka',
-        'N. Central Asia'        => 'Asia/Almaty',
-        'Myanmar'                => 'Asia/Rangoon',
-        'North Asia'             => 'Asia/Krasnoyarsk',
-        'SE Asia'                => 'Asia/Bangkok',
-        'China'                  => 'Asia/Shanghai',
-        'North Asia East'        => 'Asia/Irkutsk',
-        'Singapore'              => 'Asia/Singapore',
-        'Taipei'                 => 'Asia/Taipei',
-        'W. Australia'           => 'Australia/Perth',
-        'Korea'                  => 'Asia/Seoul',
-        'Tokyo'                  => 'Asia/Tokyo',
-        'Yakutsk'                => 'Asia/Yakutsk',
-        'AUS Central'            => 'Australia/Darwin',
-        'Cen. Australia'         => 'Australia/Adelaide',
-        'AUS Eastern'            => 'Australia/Sydney',
-        'E. Australia'           => 'Australia/Brisbane',
-        'Tasmania'               => 'Australia/Hobart',
-        'Vladivostok'            => 'Asia/Vladivostok',
-        'West Pacific'           => 'Pacific/Guam',
-        'Central Pacific'        => 'Asia/Magadan',
-        'Fiji'                   => 'Pacific/Fiji',
-        'New Zealand'            => 'Pacific/Auckland',
-        'Tonga'                  => 'Pacific/Tongatapu',
-
-        // PHP 5.5.10 failed on a few timezones that were valid before. We're
-        // normalizing them here.
-        'CST6CDT'   => 'America/Chicago',
-        'Cuba'      => 'America/Havana',
-        'Egypt'     => 'Africa/Cairo',
-        'Eire'      => 'Europe/Dublin',
-        'EST5EDT'   => 'America/New_York',
-        'Factory'   => 'UTC',
-        'GB-Eire'   => 'Europe/London',
-        'GMT0'      => 'UTC',
-        'Greenwich' => 'UTC',
-        'Hongkong'  => 'Asia/Hong_Kong',
-        'Iceland'   => 'Atlantic/Reykjavik',
-        'Iran'      => 'Asia/Tehran',
-        'Israel'    => 'Asia/Jerusalem',
-        'Jamaica'   => 'America/Jamaica',
-        'Japan'     => 'Asia/Tokyo',
-        'Kwajalein' => 'Pacific/Kwajalein',
-        'Libya'     => 'Africa/Tripoli',
-        'MST7MDT'   => 'America/Denver',
-        'Navajo'    => 'America/Denver',
-        'NZ-CHAT'   => 'Pacific/Chatham',
-        'Poland'    => 'Europe/Warsaw',
-        'Portugal'  => 'Europe/Lisbon',
-        'PST8PDT'   => 'America/Los_Angeles',
-        'Singapore' => 'Asia/Singapore',
-        'Turkey'    => 'Europe/Istanbul',
-        'Universal' => 'UTC',
-        'W-SU'      => 'Europe/Moscow',
-    );
-
-    /**
-     * List of microsoft exchange timezone ids.
-     *
-     * Source: http://msdn.microsoft.com/en-us/library/aa563018(loband).aspx
-     */
-    public static $microsoftExchangeMap = array(
-        0  => 'UTC',
-        31 => 'Africa/Casablanca',
-
-        // Insanely, id #2 is used for both Europe/Lisbon, and Europe/Sarajevo.
-        // I'm not even kidding.. We handle this special case in the
-        // getTimeZone method.
-        2  => 'Europe/Lisbon',
-        1  => 'Europe/London',
-        4  => 'Europe/Berlin',
-        6  => 'Europe/Prague',
-        3  => 'Europe/Paris',
-        69 => 'Africa/Luanda', // This was a best guess
-        7  => 'Europe/Athens',
-        5  => 'Europe/Bucharest',
-        49 => 'Africa/Cairo',
-        50 => 'Africa/Harare',
-        59 => 'Europe/Helsinki',
-        27 => 'Asia/Jerusalem',
-        26 => 'Asia/Baghdad',
-        74 => 'Asia/Kuwait',
-        51 => 'Europe/Moscow',
-        56 => 'Africa/Nairobi',
-        25 => 'Asia/Tehran',
-        24 => 'Asia/Muscat', // Best guess
-        54 => 'Asia/Baku',
-        48 => 'Asia/Kabul',
-        58 => 'Asia/Yekaterinburg',
-        47 => 'Asia/Karachi',
-        23 => 'Asia/Calcutta',
-        62 => 'Asia/Kathmandu',
-        46 => 'Asia/Almaty',
-        71 => 'Asia/Dhaka',
-        66 => 'Asia/Colombo',
-        61 => 'Asia/Rangoon',
-        22 => 'Asia/Bangkok',
-        64 => 'Asia/Krasnoyarsk',
-        45 => 'Asia/Shanghai',
-        63 => 'Asia/Irkutsk',
-        21 => 'Asia/Singapore',
-        73 => 'Australia/Perth',
-        75 => 'Asia/Taipei',
-        20 => 'Asia/Tokyo',
-        72 => 'Asia/Seoul',
-        70 => 'Asia/Yakutsk',
-        19 => 'Australia/Adelaide',
-        44 => 'Australia/Darwin',
-        18 => 'Australia/Brisbane',
-        76 => 'Australia/Sydney',
-        43 => 'Pacific/Guam',
-        42 => 'Australia/Hobart',
-        68 => 'Asia/Vladivostok',
-        41 => 'Asia/Magadan',
-        17 => 'Pacific/Auckland',
-        40 => 'Pacific/Fiji',
-        67 => 'Pacific/Tongatapu',
-        29 => 'Atlantic/Azores',
-        53 => 'Atlantic/Cape_Verde',
-        30 => 'America/Noronha',
-         8 => 'America/Sao_Paulo', // Best guess
-        32 => 'America/Argentina/Buenos_Aires',
-        60 => 'America/Godthab',
-        28 => 'America/St_Johns',
-         9 => 'America/Halifax',
-        33 => 'America/Caracas',
-        65 => 'America/Santiago',
-        35 => 'America/Bogota',
-        10 => 'America/New_York',
-        34 => 'America/Indiana/Indianapolis',
-        55 => 'America/Guatemala',
-        11 => 'America/Chicago',
-        37 => 'America/Mexico_City',
-        36 => 'America/Edmonton',
-        38 => 'America/Phoenix',
-        12 => 'America/Denver', // Best guess
-        13 => 'America/Los_Angeles', // Best guess
-        14 => 'America/Anchorage',
-        15 => 'Pacific/Honolulu',
-        16 => 'Pacific/Midway',
-        39 => 'Pacific/Kwajalein',
-    );
-
-    /**
-     * This method will try to find out the correct timezone for an iCalendar
-     * date-time value.
-     *
-     * You must pass the contents of the TZID parameter, as well as the full
-     * calendar.
-     *
-     * If the lookup fails, this method will return the default PHP timezone
-     * (as configured using date_default_timezone_set, or the date.timezone ini
-     * setting).
-     *
-     * Alternatively, if $failIfUncertain is set to true, it will throw an
-     * exception if we cannot accurately determine the timezone.
-     *
-     * @param string $tzid
-     * @param Sabre\VObject\Component $vcalendar
-     * @return DateTimeZone
-     */
-    static public function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false) {
-
-        // First we will just see if the tzid is a support timezone identifier.
-        //
-        // The only exception is if the timezone starts with (. This is to
-        // handle cases where certain microsoft products generate timezone
-        // identifiers that for instance look like:
-        //
-        // (GMT+01.00) Sarajevo/Warsaw/Zagreb
-        //
-        // Since PHP 5.5.10, the first bit will be used as the timezone and
-        // this method will return just GMT+01:00. This is wrong, because it
-        // doesn't take DST into account.
-        if ($tzid[0]!=='(') {
-            try {
-                return new \DateTimeZone($tzid);
-            } catch (\Exception $e) {
-            }
-        }
-
-        // Next, we check if the tzid is somewhere in our tzid map.
-        if (isset(self::$map[$tzid])) {
-            return new \DateTimeZone(self::$map[$tzid]);
-        }
-
-        // Maybe the author was hyper-lazy and just included an offset. We
-        // support it, but we aren't happy about it.
-        //
-        // Note that the path in the source will never be taken from PHP 5.5.10
-        // onwards. PHP 5.5.10 supports the "GMT+0100" style of format, so it
-        // already gets returned early in this function. Once we drop support
-        // for versions under PHP 5.5.10, this bit can be taken out of the
-        // source.
-        if (preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)) {
-            return new \DateTimeZone('Etc/GMT' . $matches[1] . ltrim(substr($matches[2],0,2),'0'));
-        }
-
-        if ($vcalendar) {
-
-            // If that didn't work, we will scan VTIMEZONE objects
-            foreach($vcalendar->select('VTIMEZONE') as $vtimezone) {
-
-                if ((string)$vtimezone->TZID === $tzid) {
-
-                    // Some clients add 'X-LIC-LOCATION' with the olson name.
-                    if (isset($vtimezone->{'X-LIC-LOCATION'})) {
-
-                        $lic = (string)$vtimezone->{'X-LIC-LOCATION'};
-
-                        // Libical generators may specify strings like
-                        // "SystemV/EST5EDT". For those we must remove the
-                        // SystemV part.
-                        if (substr($lic,0,8)==='SystemV/') {
-                            $lic = substr($lic,8);
-                        }
-
-                        return self::getTimeZone($lic, null, $failIfUncertain);
-
-                    }
-                    // Microsoft may add a magic number, which we also have an
-                    // answer for.
-                    if (isset($vtimezone->{'X-MICROSOFT-CDO-TZID'})) {
-                        $cdoId = (int)$vtimezone->{'X-MICROSOFT-CDO-TZID'}->value;
-
-                        // 2 can mean both Europe/Lisbon and Europe/Sarajevo.
-                        if ($cdoId===2 && strpos((string)$vtimezone->TZID, 'Sarajevo')!==false) {
-                            return new \DateTimeZone('Europe/Sarajevo');
-                        }
-
-                        if (isset(self::$microsoftExchangeMap[$cdoId])) {
-                            return new \DateTimeZone(self::$microsoftExchangeMap[$cdoId]);
-                        }
-                    }
-
-                }
-
-            }
-
-        }
-
-        if ($failIfUncertain) {
-            throw new \InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: ' . $tzid);
-        }
-
-        // If we got all the way here, we default to UTC.
-        return new \DateTimeZone(date_default_timezone_get());
-
-    }
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/Version.php b/vendor/sabre/vobject/lib/Sabre/VObject/Version.php
deleted file mode 100644
index 5b04d0b7a..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/Version.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-namespace Sabre\VObject;
-
-/**
- * This class contains the version number for the VObject package
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-class Version {
-
-    /**
-     * Full version number
-     */
-    const VERSION = '2.1.4';
-
-    /**
-     * Stability : alpha, beta, stable
-     */
-    const STABILITY = 'stable';
-
-}
diff --git a/vendor/sabre/vobject/lib/Sabre/VObject/includes.php b/vendor/sabre/vobject/lib/Sabre/VObject/includes.php
deleted file mode 100644
index d15329a6a..000000000
--- a/vendor/sabre/vobject/lib/Sabre/VObject/includes.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * Includes file
- *
- * This file includes the entire VObject library in one go.
- * The benefit is that an autoloader is not needed, which is often faster.
- *
- * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
- */
-
-// Begin includes
-include __DIR__ . '/DateTimeParser.php';
-include __DIR__ . '/ElementList.php';
-include __DIR__ . '/FreeBusyGenerator.php';
-include __DIR__ . '/Node.php';
-include __DIR__ . '/Parameter.php';
-include __DIR__ . '/ParseException.php';
-include __DIR__ . '/Property.php';
-include __DIR__ . '/Reader.php';
-include __DIR__ . '/RecurrenceIterator.php';
-include __DIR__ . '/Splitter/SplitterInterface.php';
-include __DIR__ . '/StringUtil.php';
-include __DIR__ . '/TimeZoneUtil.php';
-include __DIR__ . '/Version.php';
-include __DIR__ . '/Splitter/VCard.php';
-include __DIR__ . '/Component.php';
-include __DIR__ . '/Document.php';
-include __DIR__ . '/Property/Compound.php';
-include __DIR__ . '/Property/DateTime.php';
-include __DIR__ . '/Property/MultiDateTime.php';
-include __DIR__ . '/Splitter/ICalendar.php';
-include __DIR__ . '/Component/VAlarm.php';
-include __DIR__ . '/Component/VCalendar.php';
-include __DIR__ . '/Component/VEvent.php';
-include __DIR__ . '/Component/VFreeBusy.php';
-include __DIR__ . '/Component/VJournal.php';
-include __DIR__ . '/Component/VTodo.php';
-// End includes