new gnuplot C++ interface

[Dan S. <da...@gi...>]

I have created a simple interface that allows interaction with gnuplot 
via the C++ iostream interface.  Methods are provided for pushing data 
arrays (STL containers or Blitz++ arrays) and for obtaining mouse 
coordinates.  This interface requires the boost library.

The URL:
http://www.stahlke.org/dan/gnuplot-iostream/

- Dan Stahlke