Tcl API expanded and slightly revised, so that the plmap and plmeridians commands optionally take a procedure name as their first argument. This procedure can then perform the coordinate transformation. Note: the  implementation could possibly be optimised, as now the matrix commands are created with each invocation of the transformation procedure.
Tcl API expanded and slightly revised, so that the plmap and plmeridians
commands optionally take a procedure name as their first argument. This
procedure can then perform the coordinate transformation. Note: the 
implementation could possibly be optimised, as now the matrix commands
are created with each invocation of the transformation procedure.

svn path=/trunk/; revision=9298

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