Research Division! *Do not merge until ready*

So yeah, RD. Now featuring pointlessly huge rooms and even more maze-like maintenance tunnels because maze-like maintenance tunnels are awesome. Also featuring a mockup of the AI chamber because I can't figure out a way to make it look even remotely nice.

Don't merge this yet, I'm just putting this pull request up because I'm leaving on vacation Monday, and I don't want my stuff to be sitting in my repo where people can't get to it because there wasn't a pull request and something happened that made me unable to put up a pull request.