[ANNOUNCE] Git Rev News edition 20

Hi everyone,

I'm happy announce that the 21th edition of Git Rev News is now published:

https://git.github.io/rev_news/2016/11/16/edition-21/

Thanks a lot to all the contributors and helpers, especially Jacob,
Dscho, Markus, Gábor and Peff!

Enjoy,
Christian, Thomas and Jakub.