Make cron.js a Worker Process
This change is removes the need to start cron.js on its own. cron.js will now start under a worker thread.
Additionally :
- conf.json will no longer need the cron key.
- The Socket.IO handlers for cron.js have been removed from camera.js.
- Old cron.js file has been disabled. Old cron.js file will remain to keep old systems from having looping errors, the file will just post a notice when it starts.