Include bourbon in an ember-cli app.
Your project should already be set up to handle sass/scss builds. If you're not, do so by running:
ember install ember-cli-sass
In your ember-cli (>= 0.1.1) project, run:
ember install ember-cli-bourbon
The generator will create an app.scss with the sole contents being:
@import "bourbon";
If you already have content in your app.scss, you can add that line to the top of app.scss yourself.