Update ghost_installer.sh

Update #1
Added bits for ghost install and supervisor

To-do:
[1] - Set default variable with enter command
[2] - Grab epel repo rpm depending on $arc (32/64)
[3] - Add supervisord to yum install when epel is set
[4] - Create http://link-to-defaultghost.conf
[5] - Backups configured with rsnapshot
[6] - Clean up