These were auto-generated by the `datamigration`, and indicate 1) which apps are completely frozen in the above pickle, and 2) that the structure of the DB does not change from before to after this migration, so the ORM can be accessed in the backwards migration.

http://stackoverflow.com/questions/8756212/can-i-combine-schema-and-data-south-migrations-into-one#comment20304935_8930171