youtube/vitess — pull request #91 by enisoc (2014-10-17 22:46:15+00:00)
Title: Rename .markdown to .md and move Contributing.md

The prevailing convention on GitHub seems to be .md

Also by moving CONTRIBUTING.md to the root, GitHub will automatically
link to it when someone tries to contribute:

https://github.com/blog/1184-contributing-guidelines