<!DOCTYPE html>
<html>
<head>
  <title>App</title>
  <link rel="stylesheet" href="assets/app.css">
  <link rel="stylesheet" href="/vendor/bootstrap/dist/css/bootstrap.css">

  <!-- for more details visit: https://github.com/yeoman/grunt-usemin -->

  <!-- build:js(.) assets/vendor.min.js -->
  <script src="/vendor/jquery/jquery.js"></script>
  <script src="/vendor/handlebars/handlebars.runtime.js"></script>
  <script src="/vendor/ember/index.js"></script>
  <script src="/vendor/ember-data/index.js"></script>
  <script src="/vendor/bootstrap/dist/js/bootstrap.js""></script>
  <script src="/vendor/loader.js"></script>
  <!-- endbuild -->

  <!-- build:js(tmp/public) assets/app.min.js -->
  <script src="/assets/app.js"></script>
  <script src="/assets/templates.js"></script>
  <!-- endbuild -->
</head>
<body>
  <script>
    window.App = requireModule('appkit/app');
  </script>
  <div id="app-container" class="container"></div>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
  <title>App</title>
  <!-- build:css(.) assets/vendor.css -->
  <link rel="stylesheet" href="/vendor/bootstrap/dist/css/bootstrap.css">
  <!-- endbuild -->

  <link rel="stylesheet" href="assets/app.css">

  <!-- for more details visit: https://github.com/yeoman/grunt-usemin -->

  <!-- build:js(.) assets/vendor.min.js -->
  <script src="/vendor/jquery/jquery.js"></script>
  <script src="/vendor/handlebars/handlebars.runtime.js"></script>
  <script src="/vendor/ember/index.js"></script>
  <script src="/vendor/ember-data/index.js"></script>
  <script src="/vendor/bootstrap/dist/js/bootstrap.js""></script>
  <script src="/vendor/loader.js"></script>
  <!-- endbuild -->

  <!-- build:js(tmp/public) assets/app.min.js -->
  <script src="/assets/app.js"></script>
  <script src="/assets/templates.js"></script>
  <!-- endbuild -->
</head>
<body>
  <script>
    window.App = requireModule('appkit/app');
  </script>
  <div id="app-container" class="container"></div>
</body>
</html>

Add grunt-usemin task for vendor css
Add grunt-usemin task for vendor css
