Integrate publish command with django-storages

[jkevingutierrez]

It would be great to have the publish command integrated with django-storages. Looks like right now publish only supports aws buckets, but django-storages support other storage options.

For example, we are trying to use django-bakery to save static files in Google Cloud Storage.

Maybe the BuildableRedirectView will also need some adjustments to support django-storages as it is also using S3 directly