Initial commit of python version of example 17.  Some further minor changes will be required to get this to work under Unix/Linux.
Initial commit of python version of example 17.  Some further minor changes
will be required to get this to work under Unix/Linux.

Gary Bishop <gb@cs.unc.edu> kindly donated this code to PLplot under the LGPL.

svn path=/trunk/; revision=3695

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