Using Pheanstalk PR fix for Memory leak issue

```
PHP Fatal error:  Allowed memory size of 1073741824 bytes exhausted (tried to allocate 12034025 bytes) in /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Socket/StreamFunctions.php on line 66
PHP Stack trace:
PHP   1. {main}() /tmp/bigstalk.php:0
PHP   2. main() /tmp/bigstalk.php:29
PHP   3. TaskQueue->dequeueTask() /tmp/bigstalk.php:21
PHP   4. Pheanstalk_Pheanstalk->reserveFromTube() /usr/local/e3ds/phplib/task_queue.php:59
PHP   5. Pheanstalk_Pheanstalk->reserve() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Pheanstalk.php:283
PHP   6. Pheanstalk_Pheanstalk->_dispatch() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Pheanstalk.php:263
PHP   7. Pheanstalk_Connection->dispatchCommand() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Pheanstalk.php:372
PHP   8. Pheanstalk_Socket_NativeSocket->read() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Connection.php:100
PHP   9. Pheanstalk_Socket_StreamFunctions->fread() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Socket/NativeSocket.php:74
PHP  10. fread() /usr/local/e3ds/phplib/pheanstalk-2.1.0/classes/Pheanstalk/Socket/StreamFunctions.php:66
```