----------------
- Fixed issue 17: Integration with zest.releaser stopped working.
- Fixed issue 18: Pyroma returns the rating as an exit code, this was a
mistake. It now returns 0 on success, 1 on incorrect options and 2 if
the rating is below 8.
- Fixed issue 19: Implementing a custom test class counts as having tests.
- 8: Philadelphia is now considered a "success" based on practical experience.