Phalcon\Queue\Beanstalk enhancements

Queue:
  * peekDelayed()
  * peekBuried()
  * watch() bug fix

Job:
  * kick()
  * bury()
  * release()
  * touch()
Updated tests
Updated changelog [ci skip]
Merge pull request #1650 from sjinks/beanstalk

Phalcon\Queue\Beanstalk enhancements