PlayerData: id to PlayerId and getId() to getPlayerId()
Merge branch 'integration_test/network_gameplay' of
https://github.com/hottehead/GameDevWeek into
integration_test/network_gameplay

Conflicts:
	gdx-bunny-brawl/src/main/java/de/hochschuletrier/gdw/ws1314/Main.java
	gdx-bunny-brawl/src/main/java/de/hochschuletrier/gdw/ws1314/network/datagrams/LobbyUpdateDatagram.java