Steamclock's preliminary gamification

- Basic integration of the Galaxy leaderboard leveraging http://loopj.com/android-async-http/
- Preliminary gamification: UI and navigation overhaul both front-end (visually) and back-end (code).

Key points:
- Adopted the use of "one activity multiple fragments" UI architecture that is generally more preferable post API 11, aka Android 3.0.
- Using the MapKit SDK for better scrolling, panning, and zooming experience, as well as easier implementation of the star and rainbow overlays.
- Firefox theming: new fox app icon, orange tab bars, fira fonts, blue highlights.