text: Title: Add CodeClimate
  Body: E.g. If we look at https://github.com/trailofbits/protofuzz we can see the test coverage at the top and a link to code climate.
  
  To fix this we more or less copy the codeclimate.yml and relevant parts of the top of the README.
  
  (So the [easy] issues are good for new people who want to start contributing to look at.)