queued does not work for gmail (#27)

Feature: Added new property $response and new methods getResponse and getQueuedAs

Mail/smtp.php

@@ -380,11 +380,11 @@ protected function send_or_fail($recipients, $headers, $body)
  /* Send the message's headers and the body as SMTP data. */
  $res = $this->_smtp->data($body, $textHeaders);
 
- list($code,$args) = $this->_smtp->getResponse();
+ list($code, $args) = $this->_smtp->getResponse();
 
  $this->response = $code . ' ' . $args;
 
- if (preg_match("/ queue (.*)| queued (.*)/i", $args, $queued)) {
+ if (preg_match("/ queued as (.*)/", $args, $queued)) {
  $this->queued_as = $queued[1];
  }
 
@@ -511,7 +511,8 @@ public function disconnect()
  *
  * @since 1.6.0
  */
- public function getResponse(){
+ public function getResponse()
+ {
  return $this->response;
  }
 
@@ -522,7 +523,8 @@ public function getResponse(){
  *
  * @since 1.6.0
  */
- public function getQueuedAs(){
+ public function getQueuedAs()
+ {
  return $this->queued_as;
  }