You can clone with
Code Climate turned on free support for open source projects some time ago. It's a tool aiming to analyze code and detect bad code (as in duplicated code or overly complex code). I think it's a great tool to see opportunities for refactorings.
If you want I could add turnip there and then make a pull request adding the link to the README :-)
Sounds good to me.
Code Climate badge, fixes #70