PATCH and DELETE request support

Many testing frameworks are using Qt WebKit for headless javascript testing. In Ruby on Rails (and others), there is already support for PATCH and DELETE request methods. Is there a way to get it working?

More information can be found at these links:
https://github.com/thoughtbot/capybara-webkit/issues/553
https://github.com/thoughtbot/capybara-webkit/issues/427
https://github.com/ariya/phantomjs/issues/11384
https://github.com/ariya/phantomjs/issues/10873

RFC2068 for PATCH request method:
http://tools.ietf.org/html/rfc2068#section-19.6.1.1
RFC2068 for DELETE request method:
http://tools.ietf.org/html/rfc2068#page-53

Both requests are simply copying POST/PUT request functionality (they have body part too). So it'd be great to add support for them too.