Organize jobs

I've organized the jobs to be in the folder that represents the queue they're in.

I was getting "NameError: uninitialized constant" when running `env QUEUE=CRITICAL,HIGH,MEDIUM,LOW,LOWER bundle exec rake resque:work` so I added the jobs directory to the autoload_path. I'm not sure if that's the best way to do it, but please let me know if that's an issue and a better way of fixing it.