Getting closer

HostLobby: added for game-starting
UDPServer: changed some stuff to how we receive and broadcast data
FlagEnum: Renamed SERVER_STARTING to GAME_STARTING
Game: got it working with XNA! Just some basic stuff there right now,
but so far everything I've tried seems to be working
Class1.cs: added initialization for Game.cs
Lobby.cs: Changed SERVER_STARTING to GAME_STARTING