Add Google Analytics to base template

Author: manshreck

_layouts/base.html

@@ -57,6 +57,16 @@
     {% if page.customjs %}
       <script  async="" defer="" type="text/javascript" src="{{ page.customjs }}"></script>
     {% endif %}
+	
+	<!-- Global Site Tag (gtag.js) - Google Analytics -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=UA-106933809-1"></script>
+	<script>
+	  window.dataLayer = window.dataLayer || [];
+	  function gtag(){dataLayer.push(arguments)};
+	  gtag('js', new Date());
+
+	  gtag('config', 'UA-106933809-1');
+	</script>
 
   </body>
 </html>