Android: Implement navigation drawer

IITCm should use a [navigation drawer](https://developer.android.com/design/patterns/navigation-drawer.html), which was recently introduced in several Google apps (Mail, Maps, Earth, Plus,…). This drawer should contain:
- map
- info
- full
- compact
- faction
- debug (if enabled in preferences)

The corresponding menu items can then be safely removed. While on the map, you can show the drawer either by tapping the app icon in the upper left corner or by swiping from the left edge. In detail or chat pane, clicking the app icon returns to the map, but you can still use the swipe gesture to show the menu.

I already spoke with @leCradle about this and started implementing it. The basic functionality is implemented. He voted for removing the split action bar afterwards because less items remain and it is quite buggy (e.g. fullscreen doesn't work properly). Unfortunately, with the new highlighter selection, the action bar becomes pretty ugly and only two action items (plus overflow menu) remain (referring to Nexus 4).

*Update:* We (@leCradle and me) talked again about the new features and agreed to add another drawer on the right edge, that will contain the selections for highlighter, base layer and overlay layer.

What has been done so far:
- implemented navigation drawer
- implemented layer chooser drawer
- implemented pane switching like described above
- removed old menu items
- removed split action bar
- removed highlighter from action bar

What is yet do be done:
- use different icons for full, compact, public, faction (will be done by @leCradle)

What *could* also be implemented:
- move global actions (portals list, guess player levels, etc.) and portal actions (show raw data, IPAS) into action bar

Original idea:
<img src="https://f.cloud.github.com/assets/2741656/1188327/70995814-23c7-11e3-82a0-176a225d34a7.png" alt="Screenshot" height="400">   <img src="https://f.cloud.github.com/assets/2741656/1188366/745e7a08-23ca-11e3-9d59-3f728c9cf4a1.png" alt="Screenshot" height="400">

Current status:
<img src="https://f.cloud.github.com/assets/2741656/1193551/75c84e7c-2475-11e3-8b32-0f37a37bd5ad.png" alt="Screenshot" height="400">   <img src="https://f.cloud.github.com/assets/2741656/1193553/7a1b90ba-2475-11e3-8723-ec988b0d4bce.png" alt="Screenshot" height="400">