ClientId implemented: Callback for ClientSide, Changes in
DatagramHandler and Networkmanager
Merge remote-tracking branch 'origin/network/lobby' into
integration_test/network_gameplay

Conflicts:
	gdx-bunny-brawl/src/main/java/de/hochschuletrier/gdw/ws1314/network/NetworkManager.java
Fix in ClientId
Merge remote-tracking branch 'origin/network/lobby' into integration_test/network_gameplay