CronJob -> Precalculator, since it's not just used from cron. Fixed a bug in RootController#update_from_flickr.
Commented
Made tag attributes readonly. Removed tests of associations. Used ensure_inclusion_of in one place.
Constrained guesses to have unique photo + person + comment text. Removed now-unreachable code and its test.
Allow one person to guess twice on the same photo (with different comment text)
Added TODO
Fixed ActiveRecord::RecordNotDestroyed when a guess was deleted but the guesser was not
Moved deletion of orphaned guesser from overrides to callbacks
Make tags.raw collation utf8_bin so it can be unique but distinguish between normal and unaccented characters
Switched from script/rails to bin/rails