Make the integration more simple - make the plugin in commonjs package format

* This is not ready for merge yet, just to start a discussion about it* 

As described:
http://requirejs.org/docs/api.html#packages

that saves the need to add path to each one of hbs internal dependencies and makes the integration simpler.

Although its working on my project, the tests are failing because some issues with the paths,
I've couldnt figure it out myself yet

@113