Please do! However non-trivial contributions which add dependencies, hurt performance, or lack any examples will not be accepted.
This is academic software. Contributors of more than 1k lines worth of time/energy/moral support should email (john.parkhill@gmail.com) to be added as an official author. We will periodically publish papers about the code, and authors will be added to these papers.
Either submit a pull request, or feel free to email john.parkhill@gmail.com with code or questions.