added user merge view
Updated profile page to pull memberships using case insensitive status detail options.
Added form_url to the change_view for CustomRegFormAdmin
Removed unused code from the event admin pages.
Adding additional UD fields to profiles for use with membership applications.

The UD fields now total 30.
Added user_group and entity fixture files.
Added box fixture file.
Changed user defined field widget on membership application to text input fields.
Update membership add for corp. individuals.
fixes for profiles merge
Optimize queries for user merge for the better performance.
Restrict the initial page of user merge to super users.
Log an event for user merge.
Handle OneToOne relationship deletion in user merge.
Invalidate profile after user merge process.
User merge update.
User merge update.
Data migration to drop the user constraint on table mig_auth_user_t4_to_t5.

The constraint mig_auth_user_t4_to_t5_t5_id_fkey on the table mig_auth_user_t4_to_t5 is causing the issue for user merge.