include copy of django_extension, dont install django from git

contrib/django_extensions/django_extensions/migrations/0001_empty.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+from south.v2 import SchemaMigration
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        pass
+
+    def backwards(self, orm):
+        pass
+
+    models = {
+
+    }
+
+    complete_apps = ['django_extensions']