Merge pull request jazzband#674 from jazzband/auto-releases

Configure autoreleases

Remove unnecessary Python 2 header

Bump taggit.VERSION

Prepare for a release

Remove unnecessary total_ordering use

Already included by the parent class.

Prepare for 0.23.0 release

Prepare for 0.22.0 release.

Prepare for 0.21.6 release

Merge pull request jazzband#462 from alex/0.12.5

Prepare for 0.12.5 release.