removal of pgnuplot

[Bastian M. <bma...@we...>]

The CVS version of gnuplot includes a console mode version (gnuplot.exe) 
which supports pipes, a windowed version (wgnuplot_pipes.exe) with 
support for pipes, and the (traditional) windows version (wgnuplot.exe) 
with (fake) pipe support from within the program.  Should version 5 
really still include 'pgnuplot' to pipe to wgnuplot.exe?

In other words: I am proposing to remove pgnuplot in the next release 
altogether.  Objections?

   Bastian