Revert "removed process group as not too helpful"

This reverts commit dc6b3a1fcddd50ee07d4a2436e29829688492830.
Merge branch 'supervisor_conf' into jobs_daemon
renamed Media Cloud group to "mc" to make the name shorter to type
Merge branch 'supervisor_conf' into jobs_daemon
Gearman job daemons
don't remove Supervisor logs after stopping the process (will be useful when debugging Gearman workers)
dangling space
Supervisor README
Merge branch 'supervisor_conf' into jobs_daemon

Conflicts:
	supervisor/supervisord.conf