There are a few ways to get started with Outline.
Download the latest release from GitHub.
Install with Bower
bower install outline
To clone the git repository. Just run the following command.
[sudo] git clone firstname.lastname@example.org:matt-harris/outline.git
You will need a Sass compiler to watch and compile your Sass files into a CSS file.
Outline uses gulp.js to watch and compile the Sass files but also makes use of build tasks including autoprefixer, minifying files, JS file concatenation, image compression and browser refresh. Outline comes with a fully commented
package.json file which lists the plugins used. For more information about getting sarted with gulp read this excellent intro by Mark Goodyear
Of course you can also use a compiler / build tool of your choice. A couple of the more popular options are:-