Refactoring: renaming.
Added tankMap.
Merge branch 'master' of https://github.com/danielsuter/tank-wars

Conflicts:
	src/main/java/ch/tankwars/transport/game/GameEndpoint.java
Minor refactoring.
Merge branch 'master' of https://github.com/danielsuter/tank-wars
Merge branch 'master' of https://github.com/danielsuter/tank-wars

Conflicts:
	src/main/java/ch/tankwars/game/Game.java
Merge branch 'master' of https://github.com/danielsuter/tank-wars
Added PlayGround.