'request_path' method gets clobbered by named routes

Resources_controller defines an internal controller method called
'request_path'. But if you've got a 'map.resources :requests' in your routes.rb file, that defines a named route called 'request_path'.
So, if you've got this situation, the named route winds up clobbering
the internal method, with unpleasant results all around.

One approach to dealing with this situation is to just rename the
internal method 'request_path', to 'path_of_request' (and likewise
for 'nested_request_path'), thereby taking it out of the line of
fire.

FWIW, I've got patch against HEAD that implements this approach
in a cloned repo on github, and will shortly put in a pull request;
I hope that's not jumping the gun...