Move utility templates to prefix '_', add footer utility templates.

Utility templates moved to have '_' prefix similar to how sass files are.
Aditional templates for article and page footer contents now used to load
comments etc.

templates/_google_analytics.html

@@ -0,0 +1,12 @@
+<!-- Google Analytics -->
+<script type="text/javascript">
+    (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', '{{ GOOGLE_ANALYTICS[0] }}', '{{ GOOGLE_ANALYTICS[1] }}');
+    ga('send', 'pageview');
+
+</script>
+