title: emberjs on symfony2 dev enviroment dont work propertly
body: <p>I've builded a app with symfony2 the app expose an REST Api.</p>
  
  <p>now i build a simple client for consuming</p>
  
  <h3>app.coffee -> app.js</h3>
  
  <pre><code>App = Em.Application.create
      ready: -&gt;
          @.entradas.load()
      Entrada: Em.Object.extend()
      entradas: Em.ArrayController.create
          content: []
          load: -&gt;
              url = 'http://localhost/api/1/entrada'
              me = @
              $.ajax(
                  url: url,
                  method: 'GET',
                  success: (data) -&gt;
                      me.set('content', [])
                      for entrada in data.data.objects
                          me.pushObject DBPlus.Entrada.create(entrada)
              )
  </code></pre>
  
  <h3>MyBundle:Home:index.html.twig</h3>
  
  <pre><code>&lt;script type="text/x-handlebars" src="{{ asset('js/templates/entradas.hbs') }}"&gt;&lt;/script&gt;
  &lt;script src="{{ asset('js/libs/jquery-1.7.2.min.js') }}"&gt;&lt;/script&gt;
  &lt;script src="{{ asset('js/libs/handlebars-1.0.0.beta.6.js') }}"&gt;&lt;/script&gt;
  &lt;script src="{{ asset('js/libs/ember-1.0.pre.min.js') }}"&gt;&lt;/script&gt;
  &lt;script src="{{ asset('js/app.js') }}"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>the problem here is when i run on <code>dev</code> enviroment and link the template like <code>&lt;script type="text/x-handlebars" src="{{...}}"&gt;</code> the app dont work, nothing show but works fine over <code>prod</code> enviroment.</p>
  
  <p>he only way that works on <code>dev</code> enviroment is inline template</p>
  
  <h3>MyBundle:Home:index.html.twig</h3>
  
  <pre><code>&lt;script type="text/x-handlebars"&gt;
      {% raw %}
      &lt;ul class="entradas"&gt;
        {{#each App.entradas}}
          &lt;li class="entrada"&gt;{{nombre}}&lt;/li&gt;
        {{/each}}
      &lt;/ul&gt;
      {% endraw %}
  &lt;/script&gt;
  </code></pre>
  
  <h2>config_dev.yml</h2>
  
  <h1>Assetic Configuration</h1>
  
  <pre><code>assetic:
      debug:          %kernel.debug%
      use_controller: false
      bundles:        [ ]
      #java: /usr/bin/java
      filters:
          cssrewrite: ~
          #closure:
          #    jar: %kernel.root_dir%/Resources/java/compiler.jar
          #yui_css:
          #    jar: %kernel.root_dir%/Resources/java/yuicompressor-2.4.7.jar
  </code></pre>
  
  <h2>can explain why this behavoir?</h2>
  
  <h3>Note: I disabled the debug profiler toolbar, and nothing</h3>