Fork, make your changes, run tests and/or add tests then send a pull request.
Prerequesites: node and npm.
First run:
npm install
Then run tests with:
make test
To build the site, as well as the Browserified web version of Jison, run:
make site
Then you can also preview the site by doing:
make preview
Note that you will need nanoc and adsf in order to build/preview the site. gem install them if you haven't.