Significantly improves create script execution time by executing dependencies from .cordova folder instead of copying [WORK IN PROGRESS]

This should roughly cut our create execution time in half. The change is most beneficial on Windows where create takes much longer to execute.

Opening for visibility.
Still need to figure out where exactly to store dependencies.
Ideally it shouldn't be directly under .cordova home folder.

Please ensure this is tested on all OS including windows 7 64 bit.