Relese v3.2.0

Bump to version 3.1.2

Bump to version 3.1.1

Bump to version 3.1.0

Bump to version 3.0.0

Bump version to 2.0.1 and update changelog

Added CHANGELOG.md

inspired by https://keepachangelog.com/en/1.0.0/

Probably last version before dropping Python 2 support

Updated readme