Resolve "Introducing a labelling system for tutors to mark certain submission"

Closes #33 (closed)

core/migrations/0010_auto_20180805_1139.py

@@ -16,7 +16,7 @@ class Migration(migrations.Migration):
             name='useraccount',
             managers=[
                 ('objects', django.contrib.auth.models.UserManager()),
-                ('tutors', core.models.TutorManager()),
+                ('tutors', core.models.TutorReviewerManager()),
             ],
         ),
     ]