Add favicons and iOS icons

_includes/head.html

@@ -47,4 +47,18 @@
 <meta http-equiv="cleartype" content="on">
 
 <!-- Load Modernizr -->
-<script src="{{ site.url }}/assets/js/vendor/modernizr-2.6.2.custom.min.js"></script>
+<script src="{{ site.url }}/assets/js/vendor/modernizr-2.6.2.custom.min.js"></script>
+
+<!-- Icons -->
+<!-- 16x16 -->
+<link rel="shortcut icon" href="{{ site.url }}/favicon.ico">
+<!-- 32x32 -->
+<link rel="shortcut icon" href="{{ site.url }}/favicon.png">
+<!-- 57x57 (precomposed) for iPhone 3GS, pre-2011 iPod Touch and older Android devices -->
+<link rel="apple-touch-icon-precomposed" href="{{ site.url }}/images/apple-touch-icon-precomposed.png">
+<!-- 72x72 (precomposed) for 1st generation iPad, iPad 2 and iPad mini -->
+<link rel="apple-touch-icon-precomposed" sizes="72x72" href="{{ site.url }}/images/apple-touch-icon-72x72-precomposed.png">
+<!-- 114x114 (precomposed) for iPhone 4, 4S, 5 and post-2011 iPod Touch -->
+<link rel="apple-touch-icon-precomposed" sizes="114x114" href="{{ site.url }}/images/apple-touch-icon-114x114-precomposed.png">
+<!-- 144x144 (precomposed) for iPad 3rd and 4th generation -->
+<link rel="apple-touch-icon-precomposed" sizes="144x144" href="{{ site.url }}/images/apple-touch-icon-144x144-precomposed.png">