Transcode some characters from the PLplot convention for Greek glyphs into the Adobe encoding for the Symbol PS font.
Transcode some characters from the PLplot convention for Greek glyphs into
the Adobe encoding for the Symbol PS font.

svn path=/trunk/; revision=5846

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