Bugfix release v2.5.1 

Release v2.5.0 

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