Add favicons based on favicon.io

Author: headius

_includes/head.html

@@ -1,10 +1,13 @@
   <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
   <title>{{ page.title }} &mdash; JRuby.org</title>
-  <link rel="shortcut icon" href="/favicon.ico" />
+  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon.png">
+  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32.png">
+  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16.png">
+  <link rel="manifest" href="/site.webmanifest">
   <link rel="alternate" href="/atom.xml" title="JRuby.org News" type="application/atom+xml"/>
   <link rel="stylesheet" href="/stylesheets/main.css?version=1" type="text/css" media="screen" title="no title" charset="utf-8" />
   <!--[if lte IE 7]><link rel="stylesheet" href="/stylesheets/ie7-hacks.css" type="text/css" media="screen" title="no title" charset="utf-8" /><![endif]-->
   <link rel="stylesheet" href="/stylesheets/syntax.css" type="text/css" media="screen" title="no title" charset="utf-8" />
 
   <script type="text/javascript" src="//use.typekit.com/swo8tlm.js"></script>
-  <script type="text/javascript">try{Typekit.load();}catch(e){}</script>
+  <script type="text/javascript">try{Typekit.load();}catch(e){}</script>

images/android-chrome-192x192.png

@@ -0,0 +1 @@
+{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}