Add Google Analytics

_includes/analytics.html

@@ -0,0 +1,10 @@
+<script>
+  if (window.location.hostname == "{{ site.hostname }}") {
+    (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-102330905-1', 'auto');
+    ga('send', 'pageview');
+  } else { _gaq = []; };
+</script>