Added migration for swapping over_three to under_three #25
Updated models to change over_three to under_three #25
Updated over_three references and added help notes #25

Help notes are paragraphs added to help users add in their information.
Updating schema with recent db changes #25
Checking the under three box now hides contact info #25
Better error reporting from failed booking #25

It will now alert that the booking was full.