set up and creates seat class
seat is not booked when created
seats can be booked
the theatre has seats
rows have seats
rows have 50 seats
can place a booking on a row
refactors test
checks if a booking is for reserved seats
refactors booking range to a method
checks for two spaces between bookings
checks for enough space at the end of a row
no error on space chck if booking is next to another one
Merge branch 'master' of https://github.com/Jrmcneil/theatre