message: Add commit message intructions to the readme
diff: @@ -106,7 +106,9 @@ your contributions under the terms of the license.
  Contribute by following the typical
  [GitHub workflow](https://guides.github.com/introduction/flow/index.html)
  for pull requests. Fork the repository and make changes on a new named
  -branch. Create pull requests against the `master` branch.
  +branch. Create pull requests against the `master` branch. Follow the
  +[seven guidlines](https://chris.beams.io/posts/git-commit/) to writing a great
  +commit message.
  License
  -------
  