- multiple fixes in the Tcl commands (especially regarding the interchange between True/false and 1/0 values)

- updated the help for all Tcl Commands
- in Tcl Shell, the 'help' command will add also a brief description for each command in the list

tclCommands/TclCommandAddPolygon.py

@@ -10,6 +10,8 @@ class TclCommandAddPolygon(TclCommandSignaled):
     # array of all command aliases, to be able use  old names for backward compatibility (add_poly, add_polygon)
     aliases = ['add_polygon', 'add_poly']
 
+    description = '%s %s' % ("--", "Creates a polygon in the given Geometry object.")
+
     # dictionary of types from Tcl command, needs to be ordered
     arg_names = collections.OrderedDict([
         ('name', str)