Håvard Graff authored May 14, 2018 and Mathieu Duponchelle committed Oct 28, 2018

This patch makes the tests pass running uninstalled and installed, with
python2 and python3 on linux, windows and osx.

The main gist is to use the new python-module to do the lifting done
by pythondetector, and with that add support for python2 and windows.