Merge pull request #9 from davemun/master

Test usage of sockets.io - a client logging in will notify other clients.
Merge pull request #10 from davemun/master

Changed event names for listener for client login.
Merge pull request #11 from davemun/master

Added clientID to client data obj.
extra cube added on second user login
Merge pull request #12 from roryc89/multiple-cubes

extra cube added on second user login
Added functionality to update clients on other clients move.