Added save feature to standalone GCW device, and am now getting identical results from the GCW driver.  Fixed some of the coordinate setup issues, which happily resulted in getting dashed lines and hatching working properly.  Adopted consistent use of plabort and plwarn.
Added save feature to standalone GCW device, and am now getting identical
results from the GCW driver.  Fixed some of the coordinate setup issues,
which happily resulted in getting dashed lines and hatching working
properly.  Adopted consistent use of plabort and plwarn.

svn path=/trunk/; revision=6224

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