Enable admin: fix bug 1044184

Add admin staticfiles

Add rna dependencies and ConditionalAuthMiddleware

Add/update rna, django-pagedown

Add ConditionalAuthMiddleware, rna url

Add django-filter and settings.REST_FRAMEWORK

Add collectstatic to update_assets

Remove ctx param from base_update_assets

Clear *.pyc during deploy and move collectstatic

Add rna and api-token-auth PT
Merge pull request #2264 from mozilla/enable-admin

Enable admin: fix bug 1044184