Modified scaffold controler to enable collection routes

\cc @pixeltrix
I am right now giving finishing touches to my Google Summer of Code 2013 project of [Collection routing for Rails](http://github.com/ujjwalt/rails/tree/collection-routing)

The problem is that the Scaffold Controller is not being generated as JBuilder hijacks the process by changing Thor's source root to point to it's own generators. I've added the scaffold controller over from my own repo.