First model import
Add SourceGroup model
EventActor model, use entity kinds
Simplified Models, add unicode tests.
Added note about freezegun time
Final initial modeling
Draft of Medium API sans-tests
Subscription.subscribed_entities tests.
Medium.followers_of tests
Medium.followed_by tests.
Medium.get_event_filters_tests
Medium.subset_subscriptions tests
First Event access test.
Tests for Medium.entity_events
100% test coverage
Fix documentation underline length
Remove unnecessary docs line
Remove leading zeros in testing dates
Removed unused autodocs
Add back in ref/entity_event