Add config.default_method_for_update to support PATCH

PATCH is the correct HTML verb to map to the #update action. The
semantics for PATCH allows for partial updates, whereas PUT requires a
complete replacement.

Changes:
* adds config.default_method_for_update you can set to :patch
* optionally use PATCH instead of PUT in resource routes and forms
* adds the #patch verb to routes to detect PATCH requests
* adds #patch? to Request
* changes documentation and comments to indicate support for PATCH

This change maintains complete backwards compatibility by keeping :put
as the default for config.default_method_for_update.

1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 3046a97573..5bd9d4a215 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,7 @@ else
   gem 'arel'
 end
 
+gem 'rack-test', :git => "https://github.com/brynary/rack-test.git"
 gem 'bcrypt-ruby', '~> 3.0.0'
 gem 'jquery-rails'