Add SQLAlchemy

It's super ugly code, and everything is in one big file, but this is the
basic setup of the auction/participant system. It's going to go
something like:

- User A starts an "auction" and inputs the names of the participants
  and item(s) to bid on
- Each participant goes to http://site/auctions/:auction_id
- Once there, they click on their name, and then they can bid on said
  item(s)
- The host can check back for bids later, somehow...