0027772: Foundation Classes - define Standard_Boolean using C++ type "bool" instead of "unsigned int"

Code has been updated to remove no-op casts and implicit casts to Standard_Boolean.

Places of inproper use of Standard_Boolean instead of Standard_Integer
have been corrected:
- Bnd_Box, Bnd_Box2d
  Bit flags are now defined as private enum
- HLRAlgo_BiPoint, HLRAlgo_EdgesBlock, HLRBRep_EdgeData, HLRBRep_FaceData
  Bit flags are now defined as enum
- HLRAlgo_EdgeStatus, HLRBRep_BiPnt2D, HLRBRep_BiPoint
  Bit flags are now defined as bool fields
- HLRAlgo_PolyData
  Bit flags are now defined as Standard_Integer
- OSD_DirectoryIterator, OSD_FileIterator
  Boolean flag is now defined as Standard_Boolean
- ShapeAnalysis_Surface::SurfaceNewton()
  now returns Standard_Integer (values 0, 1 or 3)
- ChFi2d_FilletAlgo
  now uses TColStd_SequenceOfBoolean instead of TColStd_SequenceOfInteger
  for storing boolean flags

Method IFSelect_Dispatch::PacketsCount() has been dropped from interface.

ShapeFix_Solid::Status() has been fixed to decode requested status
instead of returning integer value.

TopOpeBRepBuild_Builder1 now defines map storing Standard_Boolean values
instead of Standard_Integer.

Persistence for Standard_Boolean type has been corrected
to keep backward compatibility:
- BinMDataStd, BinTools, FSD_BinaryFile

Broken Draw Harness commands vdisplaymode and verasemode have been removed.

BRepMesh_FastDiscretFace::initDataStructure() - workaround old gcc limitations

BRepMesh_IncrementalMesh::clear() - avoid ambiguity

src/XmlMDataStd/XmlMDataStd_IntegerArrayDriver.cxx

@@ -131,7 +131,7 @@ Standard_Boolean XmlMDataStd_IntegerArrayDriver::Paste
 	return Standard_False;
       } 
     else
-      aDelta = (Standard_Boolean)aDeltaValue;
+      aDelta = aDeltaValue != 0;
   }
 #ifdef OCCT_DEBUG
   else if(XmlMDataStd::DocumentVersion() == -1)
@@ -160,7 +160,7 @@ void XmlMDataStd_IntegerArrayDriver::Paste
   if (aL != 1) 
     theTarget.Element().setAttribute(::FirstIndexString(), aL);
   theTarget.Element().setAttribute(::LastIndexString(), anU);
-  theTarget.Element().setAttribute(::IsDeltaOn(), anIntArray->GetDelta());
+  theTarget.Element().setAttribute(::IsDeltaOn(), anIntArray->GetDelta() ? 1 : 0);
 
   // Allocation of 12 chars for each integer including the space.
   // An example: -2 147 483 648