WIP: workaround for content types, but not so much for auth

Ref: alexhayes#1

django_migration_fixture/__init__.py

@@ -1,6 +1,9 @@
 import os
 from django.core import serializers
 
+from django.contrib.contenttypes.management import update_all_contenttypes
+from django.contrib.auth.management import create_permissions
+
 
 class FixtureObjectDoesNotExist(Exception):
     """Raised when attempting to roll back a fixture and the instance can't be found"""
@@ -36,6 +39,9 @@ def get_objects():
                     yield obj
 
     def load_fixture(apps, schema_editor):
+        update_all_contenttypes()
+        create_permissions(apps.get_app_config('auth'), verbosity=0)
+
         for obj in get_objects():
             obj.save()
 
@@ -55,4 +61,4 @@ def unload_fixture(apps, schema_editor):
                 if not raise_does_not_exist:
                     raise FixtureObjectDoesNotExist("Model %s instance with kwargs %s does not exist." % (model, kwargs))
 
-    return dict(code=load_fixture, reverse_code=unload_fixture)
+    return dict(code=load_fixture, reverse_code=unload_fixture)