add support for the PATCH verb

lib/sinatra/base.rb

@@ -1094,6 +1094,7 @@ module Sinatra
       def delete(path, opts={}, &bk)  route 'DELETE',  path, opts, &bk end
       def head(path, opts={}, &bk)    route 'HEAD',    path, opts, &bk end
       def options(path, opts={}, &bk) route 'OPTIONS', path, opts, &bk end
+      def patch(path, opts={}, &bk)   route 'PATCH',   path, opts, &bk end
 
     private
       def route(verb, path, options={}, &block)

test/routing_test.rb

@@ -23,7 +23,7 @@ class RegexpLookAlike
 end
 
 class RoutingTest < Test::Unit::TestCase
-  %w[get put post delete options].each do |verb|
+  %w[get put post delete options patch].each do |verb|
     it "defines #{verb.upcase} request handlers with #{verb}" do
       mock_app {
         send verb, '/hello' do