Redo install instructions to be consistent with the recent refurbishment of the windows port of PLplot for Windows 98, NT, and 2000. AWI for Olof.
Redo install instructions to be consistent with the recent refurbishment of
the windows port of PLplot for Windows 98, NT, and 2000.
AWI for Olof.

svn path=/trunk/; revision=3444

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot