/**
  * Retrieve include paths
  * 
  * @return array
  */
 public static function getPath()
 {
     if (!self::$paths) {
         self::$paths = array();
         array_push(self::$paths, APPLICATION_PATH . DS . 'modules' . DS . 'core');
         array_push(self::$paths, APPLICATION_PATH . DS . 'modules' . DS . 'ext');
         set_include_path(get_include_path() . PATH_SEPARATOR . implode(PATH_SEPARATOR, self::$paths));
     }
     return self::$paths;
 }