Merge pull request #318 from dreamsxin/collection

Support method findFirstBy*/findBy*/countBy* of Phalcon\Mvc\Collection
Add method Phalcon\DI::__set/__get
Merge pull request #319 from dreamsxin/di

Add method Phalcon\DI::__set/__get
Add method Phalcon\Config\Adapter::load
Merge pull request #320 from dreamsxin/config

Add method Phalcon\Config\Adapter::load
Add class Phalcon\Async
Merge pull request #321 from dreamsxin/asyn

Add class Phalcon\Async
Updated Phalcon\Config\Adapter
Merge pull request #322 from dreamsxin/config

Updated Phalcon\Config\Adapter
Fix bug
Merge pull request #323 from dreamsxin/config

Fix bug
Updated
Add method Phalcon\Mvc\Collection::getColumnMap/setColumnMap