/**
* Set a custom loader.
*
* The loader is an object used to load the configuration. The object
* must implement a method load($env) which returns a full configuration
* array. The parameter $env is the environment to load. Used to
* implement custom loading strategies which don't necessarily use YAML.
*
* @param $loader object: Custom loader object.
*/
public static function setLoader($loader)
{
self::$loader = $loader;
}