make guide sections a macro

app/templates/common/macros.html

@@ -287,3 +287,21 @@
   </div>
 </div>
 {% endmacro %}
+
+{% macro guide_sections() %}
+  <div class="guide-container">
+  	<div class="guide-topics">
+      {% set sections %}{{ caller() }}{% endset %}
+      {{ sections | safe }}
+  	</div>
+  	<div class="guide-toc">
+    <h2>Table of contents</h2>
+      {% set toc = sections | extract_h2 %}
+      <ul>
+        {% for heading in toc %}
+          <li><a href='#{{ heading.id }}'>{{ heading.text }}</a></li>
+        {% endfor %}
+      </ul>
+    </div>
+  </div>
+{% endmacro %}