Add the new plsurf3d() API entry; add definitions for plsurf3d()/plot3d()/plmesh() "opt" arguments.
Add the new plsurf3d() API entry; add definitions for plsurf3d()/plot3d()/plmesh() "opt" arguments.

svn path=/trunk/; revision=4013

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