Removed TxAuthNo from transactions reference

Author: Mike

example/index.php

@@ -162,6 +162,7 @@
     // load POST data
     $params = $app['request']->get('params');
     $card = $app['request']->get('card');
+  /* 
     $items = new Omnipay\Common\ItemBag;
     $items->add(array(
         'id' => 'ABC123',
@@ -171,25 +172,26 @@
         'tax' => '2.00',
     ));
 /*
+
      $items->add(array(
         'id' => 'ZZZ1234',
         'name' => 'Food2',
         'quantity' => 1,
         'price' => '1.00',
         'tax' => '1.00',
     ));
-*/
+
     $params['tax'] = "2.00";
     $params['shipping'] = "1.00";
-
+*/
     // save POST data into session
     $app['session']->set($sessionVar.'.purchase', $params);
     $app['session']->set($sessionVar.'.card', $card);
 
     $params['card'] = $card;
     $params['clientIp'] = $app['request']->getClientIp();
     //$params['lowProfile'] = true;
-    $params['items'] = $items;
+    //$params['items'] = $items;
 
 /*
     print_r($params);

src/Omnipay/SagePay/Message/Response.php

@@ -40,6 +40,7 @@ public function isRedirect()
      */
     public function getTransactionReference()
     {
+/*
         if (isset($this->data['SecurityKey']) && isset($this->data['TxAuthNo']) && isset($this->data['VPSTxId'])) {
             return json_encode(
                 array(
@@ -50,6 +51,19 @@ public function getTransactionReference()
                 )
             );
         }
+*/
+
+        if (isset($this->data['SecurityKey']) && isset($this->data['VPSTxId'])) {
+            return json_encode(
+                array(
+                    'SecurityKey' => $this->data['SecurityKey'],
+                    //'TxAuthNo' => $this->data['TxAuthNo'],
+                    'VPSTxId' => $this->data['VPSTxId'],
+                    'VendorTxCode' => $this->getRequest()->getTransactionId(),
+                )
+            );
+        }
+
     }
 
     public function getMessage()