We'd love to accept your patches! Before we can take them, we have to jump a couple of legal hurdles.
Before you start working on a larger contribution, you should get in touch with us first through the issue tracker with your idea so that we can help out and possibly guide you. Coordinating up front makes it much easier to avoid frustration later on.
All submissions, including submissions by project members, require review. We use Github pull requests for this purpose.