Fixed problem with postscript text transformations, and added a workaround for the libgnomecanvas errors.  Added a new button in the standalone driver interface to zoom back to 100%.
Fixed problem with postscript text transformations, and added a workaround
for the libgnomecanvas errors.  Added a new button in the standalone driver
interface to zoom back to 100%.

svn path=/trunk/; revision=5999

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