The "Getting started" page should mention the coffee-script warning from npm.

Including Grunt as a dev dependency in package.json causes npm to display a warning message regarding coffee-script upon running "npm install":

> npm WARN prefer global coffee-script@1.10.0 should be installed with -g

Ideally, it seems that a project-local installation should not include a dependency for which a global installation is preferred, but Grunt does, so it would be helpful for this to be mentioned on the "[Getting started](http://gruntjs.com/getting-started)" page.