Moves 'New Game' button to Lobby. Adds Enter key handler to username field.
Prevents web client from entering lobby with empty username. Closes #136.
Minor tweak to Lobby page.
Disallows joining of full rooms from the lobby.

Automatically dis/enables room button when the room fills or stops being full.
Adds 'Room Full' to lobby room buttons when relevant. Closes #141.
Merge branch 'master' of github.com:JackieChiles/Cinch into console