Don't run create_permissions if we are using the non-rel PermissionsMixin
Handle the edge case where we try an update query on a non-existent instance
Remove our (old and wrong) custom test command
Move test-stub initialization out of the connector, and into a custom test runner. Much nicer.
Merge pull request #131 from potatolondon/move-test-stubs-to-testrunner

Move test stubs to testrunner (and allocate id when updating a nonexisting instance)