Added AWS_AUTO_CREATE_BUCKET setting with default of True.
Added AWS_AUTO_CREATE_BUCKET setting with default of True.

coagulant/django-storages-py3,jessamynsmith/django-storages-py3,vperron/django-storages,vperron/django-storages,bendavis78/django-storages,coagulant/django-storages-py3,bendavis78/django-storages,jessamynsmith/django-storages-py3