It's Grunt, not GruntJS :)

Also, you may want to link people to the Grunt [Getting Started](http://gruntjs.com/getting-started) guide as it explains [how to install the CLI](http://gruntjs.com/getting-started#installing-the-cli) and [how to get started with an existing project](http://gruntjs.com/getting-started#working-with-an-existing-grunt-project), which are instructions mirrored in the Bootstrap README.

Thanks!