Add PATCH to comment as valid method.

In frameworks like Rails the PATCH method is preferred over PUT. More on this: http://weblog.rubyonrails.org/2012/2/25/edge-rails-patch-is-the-new-primary-http-method-for-updates/
Merge pull request #75 from dannyvankooten/add-patch-method-type

Add PATCH to comment as valid method.