docs: function transform (opts) {
    var contents = opts.contents;
    var filePath = opts.filePath;
  
    var $ = cheerio.load(contents);
    if (path.basename(filePath) === 'index.html') {
      $('script').first().after(
        '<script src="//Microsoft.Phone.WinJS.2.1/js/base.js"></script>' +
        '<script src="//Microsoft.Phone.WinJS.2.1/js/ui.js"></script>' +
        '<script src="//Microsoft.WinJS.2.1/js/base.js"></script>' +
        '<script src="//Microsoft.WinJS.2.1/js/ui.js"></script>\n'
      );
    }
    return $.html();
  }