function __construct()
 {
     self::$file = __FILE__;
     self::$dir_path = plugin_dir_path(__FILE__);
     // Fire AJAX requests immediately
     include_once self::$dir_path . 'inc/class-ajax.php';
     // Load once we're sure everything's been loaded.
     add_action('plugins_loaded', array(&$this, 'require_files'));
     add_action('init', array(&$this, 'init'));
     // Use the `wunderground_log_debug` action for logging
     add_action('wunderground_log_debug', array('Wunderground_Plugin', 'log_debug'), 10, 2);
 }