Install Sass and Compass:
$ gem install sass compass sass-globbing
Kickoff Compass to watch changes:
$ compass watch
Serve index.html locally in the browser.
Have NPM installed. Run:
$ npm install
to install dev dependencies. We're using gulp.js as build system.
Default gulp task builds the CSS (with gulp-compass) and optimizes images:
$ gulp
Note that it's only the 'location' and 'section' images that are optimized. Specify in gulpfile.js.
These tasks are also available separately as
$ gulp sass
$ gulp images