add favicon

Author: cmontella

_layouts/default.html

@@ -5,6 +5,7 @@
                 <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=10.0, user-scalable=1" />
         <link rel="stylesheet" type="text/css" href="/css/style.css" />
         <link rel="stylesheet" type="text/css" href="/css/syntax.css" />
+        <link rel="icon" type="image/png" href="https://witheve.github.io/assets/images/favicon.png">
         <link rel="alternate" type="application/atom+xml" title="Eve Programming Language" href="/atom.xml" />
         <link href='https://fonts.googleapis.com/css?family=Open+Sans:400italic,400,700' rel='stylesheet' type='text/css'>
         <meta name="Description" content="This is the development blog of the Eve programming language">