Google Analytics for Jekyll sites

jekyll-google-analytics-tag

in _config.yml I put 
google_analytics_id: YOURID
and likely you already have url: www.example.com
Include the code below in your site header before </head>
---

{% if site.google_analytics_id %}
	<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', '{{site.google_analytics_id}}', '{{site.url | replace: "http://","" | replace: "www.","" }}');
	  ga('send', 'pageview');
	</script>
{% endif %}