Added "loopback" command: gobbles the following word, which must be "cmd", and processes the remaining arguments as any other plplot/Tcl command. This allows scripts involving widget commands -- of the form <widget> cmd <plplot command> -- to be processed by pltcl, with <widget> replaced by "loopback".
Added "loopback" command: gobbles the following word, which must be "cmd",
and processes the remaining arguments as any other plplot/Tcl command.
This allows scripts involving widget commands -- of the form <widget> cmd
<plplot command> -- to be processed by pltcl, with <widget> replaced
by "loopback".

svn path=/trunk/; revision=1466

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