Added thanks to Tony in credits section since he'll be off the title page when 5.0 comes out.
Added thanks to Tony in credits section since he'll be off the title page
when 5.0 comes out.

svn path=/trunk/; revision=763

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