Have releases also on Github

[desolat]

It would be nice to have the (PyPI) releases also on Github. Here's a tutorial which suggests to use 'git tag':

http://peterdowns.com/posts/first-time-with-pypi.html

This would also help as a mental trigger to bump the version.

[musicinmybrain]

As the maintainer of the Fedora Linux package, I need to use a GitHub source archive if I want to run the tests (because the PyPI sdist doesn’t include them), and I have to guess at the commit that corresponds to the PyPI release. Tags would be very helpful.