No comments sction when Disqus is not setup in tuxlite_tbs

tuxlite_tbs/templates/article.html

@@ -10,8 +10,10 @@
 	
         <hr>
 
-        <h2>Comments</h2>
 	{% include "twitter.html" %}
-	{% include 'disqus.html' %}
+    {% if DISQUS_SITENAME %}
+        <h2>Comments</h2>
+        {% include "disqus.html" %}
+    {% endif %}
     </div>
 {% endblock %}