Start to add a script to return overdue books
Add a table for returned loans
...and don't forget the new schema
DROP TABLE IF EXISTS old_loans
Copy data to old_loans and delet loan from loans
Add an anonymous user to the sample data
Anonymize users when loans are returned
Add users.anonymize with default = 1
Make it possible for users to toggle their anonymize setting
Make bin/returns.pl respect the anonymize setting of users
Add another loan to the sample data
Let users choose to anonymize returned loans one by one

Also change the paths for toggling the anonymize setting.