Add Phalcon\Session\Adapter\memcache
Updated
Add Phalcon\Debug [ci skip]
Merge pull request #2306 from dreamsxin/session_memcache_zep

Add Phalcon\Session\Adapter\memcache for 2.0
Using latest Zephir
Merge pull request #145 from phalcon/2.0.0

Merge 2.0.0