Default Layout
<!DOCTYPE HTML>
<html>
  <head>{{*head|core}}</head>
  <body class="right-sidebar">
    <header>{{*header|core}}</header>
    <article>{{_main|open}}</article>
    <aside>{{*sidebar|core}}</aside>
    <footer>{{*footer|core}}</footer>
  </body>
</html>