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This reverts commit 2613094d.

Change to use packaging.version to compare version numbers (because string comparison means 2.10 > 2.7 is not True)

Bump version number

iSorted

Allow unauthenticated for travis ci

Bump isort

iSort tests

This allows keeping the videos on S3, for example, although this does
require downloading the video from S3 that you just uploaded.

Django throws a warning if you paginate a queryset without an explicit
ordering.

Instead of fixing anything it just entered an infinite loop.

Fix for #17.
Fixes flake8 and isort issues.

Newer versions of flake8 are stricter about some whitespace things, and
picked up a new error in existing code.

This class was removed in Wagtail 1.8, replaced by a few utility
functions.