botch: Made Lobby work more generic, you can pass the des..

Revision 869
Made Lobby work more generic, you can pass the desired world it should be creating to it so it can work with any game
Changed Lobby to work off baseentityworld so we can have nice background levels
Touched up some lobby artworkChanged Files:
[ul]
[li]trunk/Source/Worlds/Shooter/BaseLobby.h[/li][li]trunk/Source/Worlds/Shooter/BaseLobbyCanvas.cpp[/li][li]trunk/Source/worldcommon/BaseGameModeWorld.cpp[/li][li]trunk/Source/worldcommon/BaseGameModeWorld.h[/li][/ul]
Committed By Maurino Berry