Add Python 3.6. Update install / script instructions including coverage/coveralls.
Add Python 3.6. Update install / script instructions including coverage/coveralls.

jp74/django-model-publisher,wearehoods/django-model-publisher-ai,wearehoods/django-model-publisher-ai,wearehoods/django-model-publisher-ai,jp74/django-model-publisher,jp74/django-model-publisher