Merged in rg_adding_analytics_to_docs (pull request #535)

Adding analytics to docs part of website

docs/source/_templates/layout_for_doc_website.html

@@ -0,0 +1,21 @@
+<!-- -->
+
+{% extends "!layout.html" %}
+{% block sidebartitle %}
+{{ super() }}
+<br>
+<a href="api/index.html">API reference</a>
+{% endblock %}
+
+{% block footer %}
+<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','https://www.google-analytics.com/analytics.js','ga');
+
+  ga('create', 'UA-87760032-1', 'auto');
+  ga('send', 'pageview');
+
+</script>
+{% endblock %}