simplify playerList management
Merge branch 'master' of https://github.com/ManiaPlanet/MatchMakingLobby
Merge branch 'master' of https://github.com/ManiaPlanet/MatchMakingLobby
fix interface used by setMatchMaker
Merge branch 'master' of https://github.com/ManiaPlanet/MatchMakingLobby

Conflicts:
	MatchMakingLobby/Lobby/Plugin.php
Merge branch 'master' of https://github.com/ManiaPlanet/MatchMakingLobby
change signature for getBackup method
add getMatchable method in Lobby plugin