Bump version: 2.3.0.dev1 → 2.3.0 release

Update CHANGELOG for v2.2.2

Bump version to v2.2.1

Prior v2.2.0 release blocked upload.

Update setup.py

Merge branch 'develop' into release-2.1

Update setup.py for 2.0 release.

merged method selections and fixes from the trunk