Use at command to shcedule, not cron
WIP: trying to pass stations to at command
Scheduling fixed
Watch for /tmp/ to determine the job status
Rename SSH private key
Direct ripdiko output to ~/Music/

so that when recording_controller.sh `ls /tmp/` to see if there is
any ongoing ripdiko processes, there is no leftover from
recording_setupper.sh.
Wait and deal with cache no longer necessory
Use default ruby(1.9.3) on Ubuntu 14.04