title: Dates not binding in extjs 4.1 from js date
body: <p>I am having an issue binding to the date picker in ext js 4.1.</p>
  
  <p>I'm using asp.net mvc to create my json feeds. </p>
  
  <p>I have the following .net property</p>
  
  <pre><code>public DateTime? Created { get; set; }
  </code></pre>
  
  <p>When this is serialized into json i get the following</p>
  
  <pre><code>"Created":"\/Date(1346626800000)\/"
  </code></pre>
  
  <p>On extjs 4.1 model i have the following class property</p>
  
  <pre><code>  {
              mapping:'Created',
              name:'Created',
              type: 'date'
          },
  </code></pre>
  
  <p>in my field i have the following</p>
  
  <pre><code>  {
                              xtype:'datefield',
                              name:'Created',
                              fieldLabel:' Date',
                              format:'d/m/Y',
                              width: 350
                          },
  </code></pre>
  
  <p>Whats going wrong here?</p>