Fix icon path (git#497)

Author: serjan-nasredin

_layouts/default.html

@@ -5,7 +5,7 @@
         <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
         <title>{{ page.title }}</title>
         <meta name="viewport" content="width=device-width">
-        <link rel="icon" type="image/x-icon" href="../images/logo.png"/>
+        <link rel="icon" type="image/x-icon" href="/images/logo.png"/>
         <link rel="stylesheet" href="/css/main.css">
         <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed.xml">
     </head>