`event_image` was added in [this commit](https://github.com/ICSaaS/createlab/blob/8dfc8356521659630c99d96c89940a150d426f89/db/migrate/20131025210504_add_attachment_event_image_to_events.rb). Looks like @nicktdavies added the migration but didn't run it so `schema.rb` wasn't updated.

This file looks correct so is good to merge.