Nitro 2 is written in CoffeeScript and uses the SpineJS framework.
Spine uses the Hem dependency management tool. You'll need it to build and run Nitro 2.
npm install -g hem
git clone <repo> nitro
cd nitro
npm install .
hem server
You should be open up http://localhost:9294 and be using Nitro 2.
hem build
This will compile and minify the app into the public folder.