android: keep screen on while playing
android: start/stop threads like oracle describes it: http://docs.oracle.com/javase/1.5.0/docs/guide/misc/threadPrimitiveDeprecation.html
android: hardening 'PlayGameActivity':
- disable controls when a player leaves/pauses the app (e.g. by pressing the home button).
- enable the controls again when the player resumes.
android: hardening 'JoinGameActivity'
android: hardening AsynTask
Merge pull request #8 from lumannnn/android-hardening

Android hardening