feat(app generator demo app): include ie8 fallback html5 and media qu…

…ery shims

generators/app/templates/demo/index.template.html

@@ -19,7 +19,19 @@
     <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
     <script src="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
 
-    <link rel="stylesheet" type="text/css" href="<%- styleUrl %>" /><% if ( debugging ) { %>
+    <link rel="stylesheet" type="text/css" href="<%- styleUrl %>" />#% if ( ie8 ) { %#<%
+
+    //
+    //  HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries.
+    //
+    //  NOTE: Respond.js doesn't work if you view the page via `file://`.
+    //
+
+    %>
+    <!--[if lt IE 9]>
+      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
+      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
+    <![endif]-->#% } %#<% if ( debugging ) { %>
 
     <script src="//localhost:35729/livereload.js"></script><% } %>
 </head>