add disqus comments as per hpstr theme

_layouts/page.html

@@ -39,6 +39,9 @@
     <div class="article-wrap">
       {{ content }}
     </div><!-- /.article-wrap -->
+    {% if site.disqus_shortname and page.comments %}
+      <section id="disqus_thread"></section><!-- /#disqus_thread -->
+    {% endif %}
   </article>
 </div><!-- /#index -->
 

_layouts/post.html

@@ -48,6 +48,9 @@
         <p class="byline"><strong>{{ page.title }}</strong> was published on <time datetime="{{ page.date | date_to_xmlschema }}">{{ page.date | date: "%B %d, %Y" }}</time>{% if page.modified %} and last modified on <time datetime="{{ page.modified | date: "%Y-%m-%d" }}">{{ page.modified | date: "%B %d, %Y" }}</time>{% endif %} by <a href="{{ site.url }}/about" title="About {{ site.owner.name }}">{{ site.owner.name }}</a>.</p>
       </footer>
     </div><!-- /.article-wrap -->
+  {% if site.disqus_shortname and page.comments %}
+    <section id="disqus_thread"></section><!-- /#disqus_thread -->
+  {% endif %}
   </article>
 </div><!-- /#main -->