Change log for PD external 'pd-gfsm'

v0.02 Tue, 21 Sep 2004 01:30:45 +0200
   + added 'arc_seek' message to gfsm_state
   + added 'add_weight' message to gfsm_state
   + began work on 'gfsm_markov.pd'

v0.01 Mon, 13 Sep 2004 11:11:43 +0200
   + initial version