feature: support for templated html5 creatives was added.
feature: creative URLs for versioned creatives no longer have the t parameter as it is no longer required.
removed: several deprecated upload endpoints have been disabled
bugfix: A bug was fixed where the files associated with old versions of versioned creatives were not automatically removed
bugfix: A bug was fixed which rendered the city_group table no longer editable
bugfix: A bug was fixed where changing only a start or end date when bulk editing bookings could leave the database in an inconsistent state (Zendesk ticket #19098)