re-enable comments

_includes/comments.html

@@ -0,0 +1,21 @@
+{% if page.comments %}
+
+<h2>Comments</h2>
+<div id="disqus_thread"></div>
+<script type="text/javascript">
+
+    /* * * CONFIGURATION VARIABLES * * */
+    var disqus_shortname = 'simpsonlab-gh';
+    var disqus_identifier = "{{ site.disqusid }}{{ page.url | replace:'index.html','' }}";
+
+    /* * * DON'T EDIT BELOW THIS LINE * * */
+    (function() {
+        var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
+        dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
+        (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
+    })();
+</script>
+
+<noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript" rel="nofollow">comments powered by Disqus.</a></noscript>
+
+{% endif %}

_layouts/post.html

@@ -12,4 +12,5 @@ <h1 class="post-title" itemprop="name headline">{{ page.title }}</h1>
     {{ content }}
   </div>
 
+  {% include comments.html %}
 </article>