Update index.html

added google analytics

index.html

@@ -1,6 +1,19 @@
 ---
 layout: default
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+<!-- 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-55431807-1', 'auto');
+  ga('send', 'pageview');
+
+</script>
+<!-- END -->
+
 
 <script type="text/javascript">
 if (window.clipboardData)