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+= thor
+
+Map options to a class. Simply create a class with the appropriate annotations
+and have options automatically map to functions and parameters.
+
+Example:
+
+    class App < Thor                                                 # [1]
+      map "-L" => :list                                              # [2]
+      
+      desc "install APP_NAME", "install one of the available apps"   # [3]
+      method_options :force => :boolean, :alias => :string           # [4]
+      def install(name)
+        user_alias = options[:alias]
+        if options.force?
+          # do something
+        end
+        # other code
+      end
+      
+      desc "list [SEARCH]", "list all of the available apps, limited by SEARCH"
+      def list(search="")
+        # list everything
+      end
+    end
+
+Thor automatically maps commands as such:
+
+    thor app:install myname --force
+
+That gets converted to:
+
+    App.new.install("myname")
+    # with {'force' => true} as options hash
+
+1. Inherit from Thor to turn a class into an option mapper
+2. Map additional non-valid identifiers to specific methods. In this case, convert -L to :list
+3. Describe the method immediately below. The first parameter is the usage information, and the second parameter is the description
+4. Provide any additional options that will be available the instance method options.
+
+== Types for <tt>method_options</tt>
+
+* :boolean - is parsed as <tt>--option</tt> or <tt>--option=true</tt>
+* :string  - is parsed as <tt>--option=VALUE</tt>
+* :numeric - is parsed as <tt>--option=N</tt>
+* :array   - is parsed as <tt>--option=one two three</tt>
+* :hash    - is parsed as <tt>--option=name:string age:integer</tt>
+
+Besides, method_option allows a default value to be given, examples:
+
+    method_options :force => false
+    #=> Creates a boolean option with default value false
+
+    method_options :alias => "bar"
+    #=> Creates a string option with default value "bar"
+
+    method_options :threshold => 3.0
+    #=> Creates a numeric option with default value 3.0
+
+You can also supply <tt>:option => :required</tt> to mark an option as required. The
+type is assumed to be string. If you want a required hash with default values
+as option, you can use <tt>method_option</tt> which uses a more declarative style:
+
+    method_option :attributes, :type => :hash, :default => {}, :required => true
+
+All arguments can be set to nil (except required arguments), by suppling a no or
+skip variant. For example:
+
+    thor app name --no-attributes
+
+In previous versions, aliases for options were created automatically, but now
+they should be explicit. You can supply aliases in both short and declarative
+styles:
+
+    method_options %w( force -f ) => :boolean
+
+Or:
+
+    method_option :force, :type => :boolean, :aliases => "-f"
+
+You can supply as many aliases as you want.
+
+NOTE: Type :optional available in Thor 0.9.0 was deprecated. Use :string or :boolean instead.
+
+== Namespaces
+
+By default, your Thor tasks are invoked using Ruby namespace. In the example
+above, tasks are invoked as:
+
+    thor app:install name --force
+
+However, you could namespace your class as:
+
+    module Sinatra
+      class App < Thor
+        # tasks
+      end
+    end
+
+And then you should invoke your tasks as:
+
+    thor sinatra:app:install name --force
+
+If desired, you can change the namespace:
+
+    module Sinatra
+      class App < Thor
+        namespace :myapp
+        # tasks
+      end
+    end
+
+And then your tasks hould be invoked as:
+
+    thor myapp:install name --force
+
+== Invocations
+
+Thor comes with a invocation-dependency system as well which allows a task to be
+invoked only once. For example:
+
+    class Counter < Thor
+      desc "one", "Prints 1, 2, 3"
+      def one
+        puts 1
+        invoke :two
+        invoke :three
+      end
+      
+      desc "two", "Prints 2, 3"
+      def two
+        puts 2
+        invoke :three
+      end
+      
+      desc "three", "Prints 3"
+      def three
+        puts 3
+      end
+    end
+
+When invoking the task one:
+
+    thor counter:one
+
+The output is "1 2 3", which means that the three task was invoked only once.
+You can even invoke tasks from another class, so be sure to check the
+documentation.
+
+== Thor::Group
+
+Thor has a special class called Thor::Group. The main difference to Thor class
+is that it invokes all tasks at once. The example above could be rewritten in
+Thor::Group as this:
+
+    class Counter < Thor::Group
+      desc "Prints 1, 2, 3"
+      
+      def one
+        puts 1
+      end
+     
+      def two
+        puts 2
+      end
+      
+      def three
+        puts 3
+      end
+    end
+
+When invoked:
+
+    thor counter
+
+It prints "1 2 3" as well. Notice you should describe (using the method <tt>desc</tt>)
+only the class and not each task anymore. Thor::Group is a great tool to create
+generators, since you can define several steps which are invoked in the order they
+are defined (Thor::Group is the tool use in generators in Rails 3.0).
+
+Besides, Thor::Group can parse arguments and options as Thor tasks:
+
+    class Counter < Thor::Group
+      # number will be available as attr_accessor
+      argument :number, :type => :numeric, :desc => "The number to start counting"
+      desc "Prints the 'number' given upto 'number+2'"
+      
+      def one
+        puts number + 0
+      end
+      
+      def two
+        puts number + 1
+      end
+      
+      def three
+        puts number + 2
+      end
+    end
+
+The counter above expects one parameter and has the folling outputs:
+
+    thor counter 5
+    # Prints "5 6 7"
+
+    thor counter 11
+    # Prints "11 12 13"
+
+You can also give options to Thor::Group, but instead of using <tt>method_option</tt>
+and <tt>method_options</tt>, you should use <tt>class_option</tt> and <tt>class_options</tt>.
+Both argument and class_options methods are available to Thor class as well.
+
+== Actions
+
+Thor comes with several actions which helps with script and generator tasks. You
+might be familiar with them since some came from Rails Templates. They are:
+<tt>say</tt>, <tt>ask</tt>, <tt>yes?</tt>, <tt>no?</tt>, <tt>add_file</tt>,
+<tt>remove_file</tt>, <tt>copy_file</tt>, <tt>template</tt>, <tt>directory</tt>,
+<tt>inside</tt>, <tt>run</tt>, <tt>inject_into_file</tt> and a couple more.
+
+To use them, you just need to include Thor::Actions in your Thor classes:
+
+    class App < Thor
+      include Thor::Actions
+      # tasks
+    end
+
+Some actions like copy file requires that a class method called source_root is
+defined in your class. This is the directory where your templates should be
+placed. Be sure to check the documentation.
+
+== License
+
+See MIT LICENSE.