Swiss Tournaments!

Challonge is now offering Swiss-system tournaments! I expect there will need to be a few revisions to the pairing algorithm, so I encourage Swiss-pairing-masters to check things out and get me in line.

Also among the updates:

• Avatar uploading - While I still encourage the use of Gravatar, I realize many users either don't have Gravatar accounts or would prefer to have distinct Challonge avatars.
• Updates to database schema for storing scores. This should speed things up a tad and fix a bug.