code: function minifyCss() {
    var stream = gulp.src([compiled.css + '/**/*', '!' + compiled.css + '/styleguide*'])
      .pipe(plugins.minifyCss())
      .pipe(plugins.rename({ suffix: '.min' }))
      .pipe(gulp.dest(dist.css));
    return stream;
  }
docs: minify css from public dir and drop into dist dir