Using signals to allow select on update

core/migrations/0003_submissiondoneassignmentscount.py

core/migrations/0004_auto_20180217_1723.py

core/migrations/0005_auto_20180217_1728.py

core/migrations/0006_auto_20180217_1729.py

core/models.py

core/serializers/feedback.py

core/signals.py

core/tests/test_export.py

core/tests/test_feedback.py

core/tests/test_tutor_api_endpoints.py

core/views/common_views.py

frontend/src/pages/SubscriptionWorkPage.vue