0.4
  Added functions bang, values, valuemotion, xvalues, xvaluemotion made by Maurizio Umberto Puxeddu
  Integrated patch from Joseph A. Sarlo for connections 
0.3
  Fixed "goto x y" message 
  ( hall of shame contest : confusion between absolute and relative coordinates )
0.2
  Added "goto x y" message
0.1
  first implementation