title: AngularJS $resource not sending X-Requested-With
body: <p>I'm using angular 1.1.5 and I'm using a $resource to make a XHR to a REST service but it seems like the the $resource isn't appending the header as X-Requested-With as XMLHttpRequest, <strong>is that a normal behavior?</strong> and Do I need to append the header manually?</p>
  
  <pre><code>function loginCtrl($scope,$resource) {
      $scope.submit = function () {
           var resource = $resource('/Api/User/login', {},
                {
                    authenticate: {
                        method: 'POST',
                        isArray: false,
                        headers: {
                            '__RequestVerificationToken':  $scope.loginRequest.Token
  
                        }
                    }
                });
           resource.authenticate($scope.loginRequest);
      };
  }
  </code></pre>