Enable add to homescreen for android chrome and IOS

index.html

@@ -4,8 +4,12 @@
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=Edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+    <meta name="apple-mobile-web-app-capable" content="yes">
+    <meta name="mobile-web-app-capable" content="yes">
     <title ng-bind-template="WeeChat {{ pageTitle}}"></title>
     <link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" media="screen">
+    <link rel="shortcut icon" sizes="128x128" href="img/weechat_logo_128x128.png">
+    <link rel="apple-touch-icon" sizes="128x128" href="img/weechat_logo_128x128.png">
     <link rel="shortcut icon" type="image/png" href="img/favicon.png" >
     <link href="css/style.css" rel="stylesheet" media="screen">
     <link href="css/glowingbear.css" rel="stylesheet" media="screen">