Run group promotions on group change.
Run group promotions on registration.
Load the CreatedAt field when users are loaded.
Set the default for last_ip properly.
Fix the default values in the group promotion form.
Add initial group promotion tests.
Add panel_group_promotion_registered_for phrase.
Add the registeredFor column to the users_groups_promotions table.
You will need to run the updater / patcher for this commit.
