added featured image

theme/templates/page.html

@@ -10,8 +10,15 @@
 {% endblock content_header %}
 
 {% block content_body %}
-<div>
-{{ page.content }}
+<div class="page-body">
+  {% if page.featured_image is defined %}
+  <div class="featured-image">
+    <a href="{{ page.featured_image }}" title="{{ page.title }} (Bild)">
+      <img src="{{ page.featured_image }}" alt="{{ page.title }} (Bild)" />
+    </a>
+  </div>
+  {% endif %} 
+  {{ page.content }}
 </div>
 {% endblock content_body %}