Revise database to go over REST or POST

[russellaugust]

Redo the database system so it stores the rolls as django rolls.

Also start storing all messages, in particular ones with Fountain entries. If they are edited, that should also be passed along.

This in theory is a quick add. I don't see how this could be too complex. I guess the issue is that these aren't POSTS, they're true API calls that need to be deserialized.