Got both debugging the uncompiled app and `grind deploy` to work

This is extremely hacky, but not more so than some other parts of our deployment process. There was some discussion between us and the Polymer team regarding these "../../packages" artifacts that we are still forced to use    to import HTMLs from packages, but apparently this is still unresolved, at least in the publicly available Polymer. For now just make everything work by brute force.

@devoncarew