Run source of ngCordova just like ionic source

[felquis]

Right now we run gulp watch inside modules/ionic and watch the dist directory to copy compiled files.

There's probably a similar solution to integrate both ionic source and ngCordova source, I think there's a watch task in ngCordova as well, so we could create a task to check bower.json main files, run gulp watch in the module's root, and watch for changes in the main files, and main files change, we should copy it to the www/lib/moduleName/customBuild/*

Something like this..