Big update, read comment

- Implemented routing from current location to mensa
- Inlined libraries as packages where possible (not for google-play-lib)
- Fixed some minor UI things
- Added view pager to full / all menu list
- Started with user features, not done yet
- Added app Updates into the srs, dunno if that's the right place for it
- Added UML Diagram in project folder

NOTICE: To make the map work on your device, I need to add your sha-1 key to the api key on google, execute

```
keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android
```
in terminal and send me the sha-1 fingerprint!