No need to exclude bindings/plplot_parameters.h any more from doxygen processing
No need to exclude bindings/plplot_parameters.h any more from doxygen
processing

Previously that file had to be excluded because it was being
misinterpreted as a C header.  That issue no longer exists with the
renamed version of that file, bindings/plplot_parameters.inc.

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