Changed to using pl_PacketSend for data transfer, which now requires no communication between interpreters.  Communication parameters stored in the dev->iodev structure.
Changed to using pl_PacketSend for data transfer, which now requires no
communication between interpreters.  Communication parameters stored in
the dev->iodev structure.

svn path=/trunk/; revision=698

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