Lots of fixes/improvements to plscmap1l to support TK palette manipulators.  New function plRGB_HLS added.
Lots of fixes/improvements to plscmap1l to support TK palette
manipulators.  New function plRGB_HLS added.

svn path=/trunk/; revision=824

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