added multi handler support.
router now can handle with '/' (slash) pattern.
fixed pattern params function bug.
added where function to Router. aka Pattern::define.
added custom method handler with '@' support.
fixed pattern match with '/' bug. 'rtrim' slash filter changed to 'trim'.
requests now can handle with max one handler.
fixed pattern match bug. added few pattern flags: 'digit', 'alpha', 'alphanum'.
added more complex example.