Prep. for client handling user update instructions.
Send update when position changes.
Only send message is socket.io is up.
Handle client updates.
Pass socket, not ID, to server user.
Fix bad property references.
Have client add existing users on connect.
Send correct initial position.
Rename property.
Remove duplicate logic.
Make easier to read.
Fix too many updates being sent.
Add details to debug messages.
Remove because code not shared with NodeJS anymore.
Require debug module.
Write to console when connected to server.
Fix bad property referencing.
Add more details to console messages.
Fix positions not being sent correctly to clients.
Fix positions not being stored correctly by server.