Add Google Maps API v3

- Add API JSs
- Add API calls to set markers, add routing, get directions, geo names, etc

* NOTEs:
- The Google API key should be replaced with something else
- Maybe leave it under review for now or remove user-visible parts before merging

* TODOs
- Save routing to Parse DB
- Change from/to when dragging route markers
- Re-show routing when editing
- Fix collapsing/expanding of the map control inside bootstrap modal