add pry to gemfile

Change-Id: I80bdb49621af1c837e2111cdd14e22ce6c94b61c
Use Celluloid

Still very hackish, still experimenting. I'm not actually going to use
the method I currently am using to determine if the application should
quit or not. It's just a temporary hack.

Change-Id: Ie18b1fb4aaff4ce218ac2daeff680862584df572