Updating the client and server so they now pass a 'roomCreated' and 'roomDeleted' message to all lobby members whenever a room is created or deleted.
Updating the grow21 example to use roomCreated and roomDeleted
Lobby refreshes when room is added or deleted
Adding config option to turn off room create/delete message sending
Merge pull request #32 from incompl/room-create-delete

Adding roomCreated and roomDeleted events