Session Dostroy compatible with Phalcon 1.3

From Phalcon 1.3 Phalcon\Session\AdapterInterface is compatible with SessionHandlerIterface so to works with 1.3.0 destroy method must have parameter $session_id
Fix memcache destory for Phalcon 1.3.0
Update Mongo:destroy() for Phalcon 1.3.0
Uses type hinting
Documentation fixes
Improve MongoDB Session Adapter

- improve performance: prevent multiple findOne() on read() and write()
- improve performance: do not write, if session data did not change
- improve performance: use session_id() as _id to use index
- implement garbage collection
- fix doc block
- streamline variable names
Implement \SessionHandlerInterface
Do not implement \SessionHandlerInterface to keep compatibility with PHP 5.3
Twig: fix getSecurityToken/TokenKey not working

php error is: Using $this when not in object context in <b>/[..]/app/incubator/Mvc/View/Engine/Twig.php</b>
Twig: added function url(route)
Remove debug info
Update README.md

correct minor spelling
Adding MySQL extended dialect
Fixes in README [ci skip]
Update MysqlExtended.php
Beanstalk fixes to return correct list of tubes and tubes stats.
Fix PHP_CodeSniffer error
Sleep when no jobs in tube
change array short syntax [] to full syntax for supporting PHP5.3
added Phalcon\Acl\Factory\Memory class which is intended to ease creation of Phalcon\Acl\Adapter\Memory objects when using Phalcon\Config for configuration, as well as tests for it covering 100% CC