Add libplot output driver. Suggested by Robert S. Maier
<rsm@math.arizona.edu>: "it produces output in idraw-editable PS format, PCL5
format, xfig-editable format, Illustrator format,..., and can draw vector
Add libplot output driver. Suggested by Robert S. Maier
<rsm@math.arizona.edu>: "it produces output in idraw-editable PS format, PCL5
format, xfig-editable format, Illustrator format,..., and can draw vector