Thanks to @kenkeiter for bringing up the fact that http_router [is missing PATCH](https://github.com/joshbuddy/http_router/blob/master/lib/http_router/route.rb#L5).

This commit overrides it supporting everything that [Sinatra supports as helpers](https://github.com/sinatra/sinatra/blob/master/lib/sinatra/base.rb#L1375-L1382).

I got rid of TRACE since there's no helper for it and route is private
so you can't use it at all :).

See the IRC discussion here: http://irclogger.com/.padrino/2013-03-25.

Fixes #1180.
Merge pull request #1181 from padrino/comply-to-sinatra-supported-http-verbs

Add missing HTTP verbs to http_router