root/pypi: links for commongroups

root/pypi commongroups-2017.4.4.tar.gz
root/pypi commongroups-2017.4.4-py3-none-any.whl
root/pypi commongroups-2017.4.3.tar.gz
root/pypi commongroups-2017.4.3-py3-none-any.whl
root/pypi commongroups-2017.4.2.tar.gz
root/pypi commongroups-2017.4.2-py3-none-any.whl