systemd-python: provide version info to sphinx
systemd-python: provide version info to sphinx

systemd/python-systemd,again4you/python-systemd,again4you/python-systemd,Awesense/python-systemd,keszybz/python-systemd,Awesense/python-systemd,keszybz/python-systemd,Awesense/python-systemd,systemd/python-systemd