Increased the number of shade regions to make it a bit more interesting when playing with the palette.
Increased the number of shade regions to make it a bit more interesting
when playing with the palette.

svn path=/trunk/; revision=821

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