CONTRIBUTING.md

Summary

Maintainability
Test Coverage
# Contribute
- Fork the project.
- Make your feature addition or bug fix.
- Add tests for it. This is important so I don't break it in a future version
  unintentionally.
- Commit, do not mess with version
- If you add functionality, document it in the README
- Send me a pull request. Bonus points for topic branches.

## How to run tests
run `make test`