Version 2.2

Tag version 3.1

Prepare 3.1 beta release:

- Remove deprecated features and update deprecation notices for next
release.
- Update release notes.
- Bump version

Version 3.0.2

Version 3.0.1

Version 2.1.1

Tag version 3.0

Prepare 3.0 alpha release. (django-oscar#3547)

Tag version 2.1.0

Update Make command for release to include statics build step.