1.51  2004-12-03  bugfix in parametricplotThreeD, use \pst@dima instead of \pst@cnta
1.50  2004-11-24  spurious blank in \pstThreeDBox
1.49  2004-11-18  mostly rewrite \parametricplot
1.48  2004-11-16  drawStyle was ignored
1.47  2004-11-16  change the subprocedure for specialplot
1.46  2004-11-16  change the subprocedure for quick plot
1.45  2004-11-15  some more tweaks to parametricplotThreeD
1.44  2004-11-15  bugfix in parametricplotThreeD
1.43  2004-11-07  bugfix in parametric plot  
1.42  2004-11-04  added macro \psPlaneGrid  
1.41  2004-10-31  modification to \psplane (Torsten Suhling)
1.40  2004-10-31  use pst-xkey 
