adding disqus

post.html.diff

diff --git a/_layouts/post.html b/_layouts/post.html
index e75c724..9f70c29 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -23,5 +23,22 @@ layout: default
   <div class="post-content" itemprop="articleBody">
     {{ content }}
   </div>
+{% if page.comments %}
+  <div id="disqus_thread"></div>
+  <script>
+      var disqus_config = function () {
+          this.page.url = "{{ page.url | prepend: site.baseurl | prepend: site.url }}";
+          this.page.identifier = "{{page.url}}";
+      };
+      (function() {  // DON'T EDIT BELOW THIS LINE
+          var d = document, s = d.createElement('script');

+          s.src = '//>>DISQUSSHORTNAME<<.disqus.com/embed.js';
+
+          s.setAttribute('data-timestamp', +new Date());
+          (d.head || d.body).appendChild(s);
+      })();
+  </script>
+  <noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript" rel="nofollow">comments powered by Disqus.</a></noscript>
+{% endif %}
 </article>