Start gns3server on cloud instance and establish websocket connection

This changes adds the functionality to start gns3server on a cloud instance and establish a websocket connection with it.

Starting an instance with rackspace takes 7-15 minutes, so we should probably set users expectations with a dialog box or something.
I commented it out because it was referencing a nonexistent variable.  I'm not entirely sure what the line was there for.  I will delete it.