Add missing ember-web-app tags

Author: Turbo87

app/index.html

@@ -12,6 +12,9 @@
     <link rel="stylesheet" href="{{rootURL}}assets/vendor.css">
     <link rel="stylesheet" href="{{rootURL}}assets/cargo.css">
 
+    <link rel="manifest" href="{{rootURL}}manifest.webmanifest">
+    <meta name="msapplication-config" content="{{rootURL}}browserconfig.xml">
+
     {{content-for 'head-footer'}}
     <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
     <link rel="icon" href="/cargo.png" type="image/png">