public static function add($name, $callback)
	{
		if ( ! isset(self::$events[$name]))
		{
			// Create an empty event if it is not yet defined
			self::$events[$name] = array();
		}
		elseif ( ! isset(self::$events[$name][$callback]) )
		{
			// The event already exists
			return FALSE;
		}

		// Add the event
		self::$events[$name][$callback] = $callback;

		return TRUE;
	}