Add credit card number to booking
Add credit card validation
Add card security code to booking model
Add card number validation
Add security code validation and test cases
Change security code to string and add validation and tests
Update factory definitions
Add cardholder name to bookings
Adjust sample data
Add card exp date to bookings
Update new booking view
Add card exp year to booking and relevant test cases
Toggle paid booking status
Update factories and sample data
Add billing info and confirmation email to bookings model
Add billing test cases
Update factory definitions
Complete booking billing info