2x2 to avoid engine bug

couple of custom sprites for mikade to override in a lua sidecar if he wants to

Inform engine if player is back after being disconnected

Allow server admins to join room of another protocol version

Fix issue #791: - Send drawn map data on room creation - Don't use MAP parameter to deduce mapgen when it is one of "+rnd+", "+drawn+", "+maze+"

Racer challenge map #9

merge time. it's been a while