CHANGE EVERYTHING - Sinatra edition

This is so major there's barely a reason to keep a single repo.  Anyway, here it is.  It works, I already redirected the DNS to the new hosting on Linode and stuff. Woot.

 * Every rails file has been removed and sinatra added. Its pretty damn fly and way way way simpler.  Check it out https://github.com/theoretick/discuss-it/tree/sinatra-rewrite

 * I just deleted the fucking tests.  It'd be nice to have them again but at this point other than the unit tests, probably need to start over on those.
 * `lib` directory is almost identical except for the `caching` module that was added.
 * Closes out #58 and most of #75