Merge branch 'develop' of https://github.com/e2nIEE/pandapower into d…

…evelop

Merge pull request e2nIEE#635 from FlorianShepherd/develop

pandapower 2.2.1

Merge pull request e2nIEE#614 from FlorianShepherd/develop

pandapower version tag, copyright etc for v 2.2.0

release pandapower 2.0.1

release pandapower 2.0.1

fixes for packaging release of pp 2.0

rtd setup

badges

pandapower 1.5.1

pandapower 1.5.0