Renamed excerpt to summary

_layouts/default.html

@@ -62,9 +62,9 @@
           <ul>
             {% for child in children_list %}
               {% if child.parent == page.title and child.title != page.title %}
-                {% if child.excerpt %}
+                {% if child.summary %}
                   <li>
-                    <a href="{{ child.url | absolute_url }}">{{ child.title }} - {{ child.excerpt }}</a>
+                    <a href="{{ child.url | absolute_url }}">{{ child.title }} - {{ child.summary }}</a>
                   </li>
                 {% else %}
                   <li>