Use phalcon_camelize for namesapce

```php
$di->set('router', function () {
		$router = new \Phalcon\Mvc\Router();
		$router->add(
			"/admin/:namespace/:controller/:action",
			array(
				"namespace" => 1,
				"controller" => 2,
				"action"     => 3
			)
		);
		return $router;
});
```
When use url:`http://localhost/admin/my/index/index`, error:
`my\IndexController handler class cannot be loaded`