title: Ajax Error callback not firing for iPhone
body: <p>Error callback does not work if async request is sent but success does! and it works perfectly fine in Android and browser.
  In iPhone it works for synchronous request. here is my code.
  other apis work perfectly fine.</p>
  
  <pre><code>$.ajax({
          type: 'POST',
          url: "https://api.cloud.appcelerator.com/v1/users/login.json?key=xxxxxxxxx",
          data: {
              "login": useremail,
              "password": password
          },
          success: function (resp) {                                               
              console.log(resp);
              console.log('User logged-in successfully');               
          },
          error: function (e) {
              console.log(e)
          }
      });
  </code></pre>
  
  <p>API returns status code 200 for correct email and password but 401 for incorrect one so if status code is 200 its works well I get response in success. </p>