code: function generateSite() {
    return new Promise((resolve, reject) => {
      Metalsmith(__dirname)
        .metadata({
          site: {
            title: "Qooxdoo Application Server",
            description: "Mini website used by \"qx serve\"",
            email: "info@qooxdoo.org",
            twitter_username: "qooxdoo",
            github_username: "qooxdoo",
            pages: [ "/", "/about/" ]
          },
          baseurl: "",
          url: "",
          lang: "en",
          partials: {}
        })
        .source('./src')
        .destination('./build')
        .clean(true)
        .use(loadPartials)
        .use(markdown())
        .use(getPages)
        .use(layouts({
          engine: 'dot'
        }))
        .build(function(err) {
          if (err)
            reject(err);
          else
            resolve();
        });
    });
  }
docs: Generates the site with Metalsmith
  
  @returns {Promise}