GitHub introduced a feature to add templates for pull requests. This templates help to make pull requests easier and reduce amount of work normalizing them. Additionally GitHub reads a CONTRIBUTING file which is shown as guideline if someone opens a pull request for the project. We should use this feature to inform contributors about our workflows.
- Pull request template: https://github.com/blog/2111-issue-and-pull-request-templates
- Contribution guidelines: https://help.github.com/articles/setting-guidelines-for-repository-contributors/