Fixed empty mainDeck bug
Added settings receiving to ClientNetworkHandler, piggybacking off of
PLAYER_NAME message
Added Message.Keys.GAME_SETTINGS
Added Message().containsKey()
Added settings sending changes to ServerRoom class.
Removed dummy GameClient class. Useless now that we have a proper client
GUI
Added more ClientNetworkHandler logic
Removed all constants from MC. Using Message.Names and Message.Keys
instead now.
Updated all code to reflect changes to the new constant system.
Added more constants to Message.Names and Message.Keys
Added bidding state logic to ServerRoom