In order to Contribute just git clone the repository and then run:
npm install grunt-cli --global
npm install
grunt
Be sure to have PhantomJS installed as Karma tests use it. Otherwise, in mac just run
brew install phantomjs
All changes must be done in src/restangular.js and then after running grunt all changes will be submited to dist/
Please submit a Pull Request or create issues for anything you want :).