To contribute, fork the repo, then clone it from your fork:
$> git clone git@github.com:<your GitHub name>/rdrc2015.git
Bundle and run the Rails server:
$> cd rdrc2015
$> bundle install
...
$> rails s
Develop locally, commit your changes and push to your fork:
$> git add .
$> git commit -m 'Your commit message'
$> git push origin master
Then issue a Pull Request through GitHub.
Thank you!