title: ExtJs 4 - cross domain policy
body: <p>I have a simple model:</p>
  
  <pre class="lang-js prettyprint-override"><code>Ext.define('MovieModel', {
          extend : 'Ext.data.Model',
          fields : [ {
              name : 'Title',
              mapping : '@title',
              type : 'string'
          } ],
  
          proxy : {
              type : 'ajax',
              url : 'http://www.imdbapi.com/?r=xml&amp;plot=full',
              method : 'GET',
              reader : {
                  type : 'xml',
                  record : 'movie'
              }
          }
      });
  </code></pre>
  
  <p>But this code doesn't support cross domain policy. How could I solve it?</p>