Fix for #100

Uses jekyll.environment value to enable or disable disqus and google analytics on serve

_layouts/post.html

@@ -26,8 +26,10 @@
           {{ page.content | markdownify }}
 
           {% include share.html %}
-
-          {% include comments.html %}
+          
+          {% if jekyll.environment == "production" %}
+            {% include comments.html %}
+          {% endif %}
 
           {% include social-buttons.html %}