Change 290953 had a related patch set uploaded (by Jdrewniak):
T135902, T136432 Adding readme and contribution docs
Change 290953 merged by jenkins-bot:
T135902 readme, license and contribution files - README file - CONTRIBUTING file - LICENSE file - CC license on wikipedia.org
This was pushed to production on June 7, 2016.
The wikipedia.org contributing file is located here: