* Install drf-yasg

* Add drf-yasg settings and urls

* Pin drf to make drf-yasg work

* Adjust config-models version to be compatible

* Remove django-rest-swagger (the old way)

This reverts commit 375ccb7b.

This reverts commit bf88bca7.

* Install drf-yasg

* Add drf-yasg settings and urls

* Pin drf to make drf-yasg work

* Adjust config-models version to be compatible

* Remove django-rest-swagger (the old way)

Changelog: http://docs.gunicorn.org/en/stable/2016-news.html

This adds a new django app -- edx-when -- that will copy start and due dates to mysql and allow per-learner overrides in the instructor dashboard, using the existing IDDE interface.
It adds a data migration for existing IDDE data.

The pinned version is the one tagged with a release that is also on
PyPI.

https://github.com/jazzband/django-pipeline/tree/1.5.3

Use PyPI instead since that will be faster.

This has the effect of preventing Open edX installations from having
details which should be in configuration (because they're
edx.org-specific) end up in their applications.

We intend for subsequent versions to be reviewed manually before
finding their way into edx-platform proper; this prevents subsequent
releases from finding their way in without human intervention

This reverts commit 544c7f7e.

Fixes: https://openedx.atlassian.net/browse/INCR-16

Update deprecated pygeoip
to geoip2 and all usages
of it

Learner-6238

add a proctoring settings button to course outline in Studio for each proctored subsection for a course using a provider that supports a dashboard