Remove unused function.
Create a user module.
Require user module.
Create initUser function.
Create socket module.
Connect to socket server and initialize user.
Uppercase first letter of class.
Create isUserOnline function.
Print to console when initializing a user.
Require socket module.
Update socket.disconnect function.
Remove unused init function.
Improve event messages.
Print to console when sending out heartbeat.
Remove comment.
Load socket.io in HTML HEAD instead of via AJAX.
Print to console when user disconnects.
Print to console when user responds to ping.
Only load world if user init with server is successful.
Prevent error caused by ping responses from non-init'd users.