Thanks for your interest in contributing!
I didn't yet have time to write some formal rules, but I think at begin "common sense" and usual github "best practices" should be sufficient.
Any kind of meaningful contribution is welcome!
- Reporting a bug (and later testing the updated code)
- Submitting a fix / pull requests
- Proposing new features
- Adding content to wiki
- If it would be non trivial change, then please open a issue for this and let me briefly know about the content of the changes.
- ...