Updating MySQL connection handling, upgrading to node-mysql rc1

* Make sure studio works
* Log into the MySQL server
* Run 'sudo mysql' to get to the mysql prompt
* Run 'SHOW PROCESSLIST;'
* The longest running process should currently be the ShareJS connection. If it's hard to tell, you will have to wait until the other connections finish and there is only one.
* Run 'KILL PROCESS_ID_HERE;'
* Make sure studio still works!
* Log into app server and run 'cat /mnt/ephemeral/log/sharejs/sharejs.log'
* Look for the line:
```db error { [Error: Connection lost: The server closed the connection.] fatal: true, code: 'PROTOCOL_CONNECTION_LOST' }```