Changed plplot direct widget commands to begin with a "pl", e.g. scol<?> to plscol<?>, etc.  To make going between the C and Tcl API's as natural as possible.
Changed plplot direct widget commands to begin with a "pl", e.g. scol<?>
to plscol<?>, etc.  To make going between the C and Tcl API's as natural
as possible.

svn path=/trunk/; revision=954

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