Create a model for Guests, make a script to generate rsvp codes
Make rsvp codes have a length of 5
Fill out the rest of the fields for a Guest, add sql migration file
Add python class to upload guests via http
Apply db evolutions by default (Heroku, I thought you did it by default already!)
Also configure evolutions in application.conf
Restrict access to the admin pages via environment variable
Fix bug that causes postgres to think the rsvp codes have newlines at the end
Turn the rsvp form into a 2 phase form.  Check for code in 1st part, allow guest edits in 2nd part.