Update head.html

docs/_includes/head.html

@@ -18,4 +18,16 @@
 		<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.18.1/styles/default.min.css">
 		<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.18.1/highlight.min.js"></script>
 		<script>hljs.initHighlightingOnLoad();</script>
+		
+		<script>
+		//百度统计
+		var _hmt = _hmt || [];
+		(function() {
+		  var hm = document.createElement("script");
+		  hm.src = "https://hm.baidu.com/hm.js?1bc91837a6098d36e0339bae84ab02fb";
+		  var s = document.getElementsByTagName("script")[0]; 
+		  s.parentNode.insertBefore(hm, s);
+		})();
+		</script>
+
 </head>