Update blog style templates and configuration.

_includes/footer.html

@@ -4,5 +4,20 @@
     </div>
 </div>
 <script src="{{ site.url }}/assets/js/app-concat.js"></script>
+{% if site.ga %}
+<script>
+  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+     (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+       m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+         })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+
+ga('create', '{{ site.ga.code }}', '{{ site.ga.domain }}');
+ga('send', 'pageview');
+
+</script>
+{% endif %}
+{% if page.comments %}
+{% include disqus.html %}
+{% endif %}
 </body>
-</html>
+</html>