Chat is fully operational.
made chat room more user friendly.
Modified Display messages, no more Game ID.
Improved the GameLobby.

#Update:
The GameLobby will successfully send and receive
messages as Command objects. Users can send messages
by either pressing enter or the send button.
added jUnit tests, added more Command support

#jUnit Tests:
EndGame, Team, World

#Update:
Added support for more Commands. Finalized DisplayMessage,
EndGame, and started KillSelectable. Updated World, Team,
GameManager, ServerInterpreter in order to mach these changes.
last commit before merge