Merge branch 'ls/github' into maint
authorJunio C Hamano <gitster@pobox.com>
Sat, 24 Jun 2017 22:29:29 +0000 (15:29 -0700)
committerJunio C Hamano <gitster@pobox.com>
Sat, 24 Jun 2017 22:29:29 +0000 (15:29 -0700)
Help contributors that visit us at GitHub.

* ls/github:
Configure Git contribution guidelines for github.com

Trivial merge