Run create_deliveries in a after_save hook. This enables us to check orders as payed using the ActiveAdmin interface.
cleanup tests.
remove puts
add flash messages to the application layout
show created_at in ActivAdmin for orders
Save Grind and Subscription on the Order object.
don't create deliveries with shipping month > 12.
If it turns out that a Order is invalid, then it should not have any Deliveries either.
run if statement inline
normalize whitespace