jekyll-github-metadata
By parkr
:octocat: Common repository information, such as the project name and description, is available to Jekyll sites hosted on GitHub Pages via site.github. Repository metadata on github-pages
To install, add this to your Gemfile:
gem "jekyll-github-metadata"
  and run bundle install. To use, run Jekyll with
  bundle exec preceding it:
$ bundle exec jekyll build
$ bundle exec jekyll serve