tweet every 4 hours
Add links to instructions on sign up and profile page
extract bulletin tweeting to a class
use BulletinTweeter class to tweet
move callbacks to private methods
remove tests and methods that aren't being used by bulletin model
instantiate new scorekeeper for every bulletin
WIP of putting full score in db
expire bulletins after 2 days so they won't be tweeted again
remove bulletin count from site info json