Make sure only new entities pick up default values, to avoid resetting an empty value to the current date.

Issue #1359464, Temporary fix for broken handling of repeating dates on users with a TODO to figure out where it's coming from.

Issue #1389346 by tim.plunkett: Fixed 'Manage display' page shows 'Show repeat rule' even when set to hide.

Issue #1396536, Repeating fields weren't getting created with Devel Generate because of the change in widgets. Add new hooks so Date Repeat Field can add the repeats.

Issue #1236216, Start the process of moving the repeating date integration out of the Date module and into a separate, Date Repeat Field module.