def setup
      FileUtils.makedirs([css_dir, image_dir, js_dir])
      FileUtils.cp(@theme.filename, File.join(css_dir, 'coco.css'))
      FileUtils.cp(@img_files, image_dir)
      FileUtils.cp(File.join(Coco::ROOT, 'template/js/coco.js'), js_dir)
    end
def setup
      FileUtils.makedirs([css_dir, image_dir, js_dir])
      FileUtils.cp(@theme.filename, File.join(css_dir, 'coco.css'))
      FileUtils.cp(@img_files, image_dir)
      FileUtils.cp(File.join(Coco::ROOT, 'template/js/coco.js'), js_dir)
    end
Public: Make all directories needed to store the HTML report, then
 copy media files (css, images, etc.).

 Returns nothing.