I think "install -g CoffeeScript" needs to be "install -g coffee-script"
I think "install -g CoffeeScript" needs to be "install -g coffee-script"

npm install -g CoffeeScript
npm http GET https://registry.npmjs.org/CoffeeScript
npm http 404 https://registry.npmjs.org/CoffeeScript
timglabisch/slides_coffeescript