[dxwg] new commits pushed by pwin

The following commits were just pushed by pwin to https://github.com/w3c/dxwg:

* Create CONTRIBUTING.md
  by pwin
https://github.com/w3c/dxwg/commit/94d68720952f2f0dc6ff6d25909bb8f75cf42dcf

Received on Tuesday, 17 July 2018 20:15:14 UTC