0025748: Parallel version of progress indicator

Progress indication mechanism is refactored to support incrementing progress within multithreaded algorithms.

The class Message_ProgressIndicator is only an interface to the user application.
It accumulates the progress provided by progress scopes.
The counter is protected by mutex for thread-safety.

The new class Message_ProgressScope replacing Message_ProgressSentry should be used to advance the progress.
The scopes are nested to each other to reflect the nested nature of operations.
The new class Message_ProgressRange should be used to pass the progress to sub-scopes.

All OCCT algorithms involving progress indication have been updated to new API.

Improvements in Draw_ProgressIndicator:
- Separate console mode has been added in order to make possible to put the progress into std::cout instead
  or in addition to the draw interpreter, instead of trigger option "-tclOutput".
- Treatment of Ctrl-Break signal has been added.
  Now any operation can be aborted by Ctrl-C or Ctrl-Break keystroke.

Added new test case 'perf fclasses progr_par' for testing of parallel work of the progress.

src/BRepTest/BRepTest_SurfaceCommands.cxx

@@ -36,6 +36,7 @@
 #include <TopExp_Explorer.hxx>
 #include <TopoDS.hxx>
 #include <TopoDS_Face.hxx>
+#include <TCollection_AsciiString.hxx>
 #include <Geom_Surface.hxx>
 #include <Geom2d_TrimmedCurve.hxx>
 #include <TopTools_ListOfShape.hxx>
@@ -455,7 +456,7 @@ static Standard_Integer sewing (Draw_Interpretor& theDi,
     aSewing.Add(aSeq.Value(i));
   
   Handle(Draw_ProgressIndicator) aProgress = new Draw_ProgressIndicator (theDi, 1);
-  aSewing.Perform (aProgress);
+  aSewing.Perform (aProgress->Start());
   aSewing.Dump();
 
   const TopoDS_Shape& aRes = aSewing.SewedShape();