Doc site for Yavin built with Jekyll

1. RUN git submodule update --init --recursive
2. install bundler sudo gem install bundler
3. install bundle gems: sudo bundle install
4. start jekyll bundle exec jekyll serve --config _config.yml,_config_dev.yml
5. visit page at http://localhost:4000/
6. edit the pages you care about
7. submit a PR so the rest of the world can see your helpful information