Switch to a 6 control point scheme for the default cmap1 palette (taken from the cmap1a1.pal palette added recently).  Doesn't obscure weak structures as much and manipulation through the palette tool is much more powerful than with the old 4 control point scheme.
Switch to a 6 control point scheme for the default cmap1 palette (taken from
the cmap1a1.pal palette added recently).  Doesn't obscure weak structures as
much and manipulation through the palette tool is much more powerful than
with the old 4 control point scheme.

svn path=/trunk/; revision=3560

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