First release candidate of 2.5
Bump version to 2.4.0
Bump all relevant versions to 2.4.0-rc2
Update .gitignore
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