Restore google prefill button functionality

Add google maps js back to AdminVendor form to enable data prefill based
on restaurant name. Set inherited form Media to explicitly extend base class Media.
Merge pull request #123 from cwimbrow/bug/google_prefill_button

Restore google prefill button functionality
Lighten up blue and add legend.

Refactored and commented the JS a bit. Introduced some sloppy code,
removed some. These files are under pretty active development so
it should get taken care of soon.
LIVESITE FIX! Make recently added exclude created=None