Added Google Analytics.

_layouts/default.html

@@ -49,5 +49,15 @@
       </section>
     </div>
 
+    <!-- BEGIN: Google Analytics -->
+    <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', 'UA-259868-12', 'auto');
+      ga('send', 'pageview');
+    </script>
+    <!-- END: Google Analytics -->
   </body>
 </html>