0024023: Revamp the OCCT Handle -- general

Missing headers added; includes of headers "Handle_...hxx" removed.

Misuses of macro Handle() and its use in typedefs corrected.

Alias classes Profile and Option are removed from IFSelect; ones defined in MoniTool are used directly.

Removed header files defining only Handle classes (except Image_PixMap_Handle.hxx)

Classes SelectMgr_BaseFrustum and now inherit Standard_Transient and can be manipulated by Handle (not NCollection_Handle)

Fixed reference-type local variable pointing to temporary object

Use of handle in conditional expressions and comparisons to NULL are replaced by call to method IsNull()

src/BRepOffset/BRepOffset_Inter2d.cxx

@@ -49,6 +49,7 @@
 #include <Geom_Line.hxx>
 #include <Geom_Plane.hxx>
 #include <Geom_TrimmedCurve.hxx>
+#include <Geom_BSplineCurve.hxx>
 #include <GeomConvert_CompCurveToBSplineCurve.hxx>
 #include <Precision.hxx>
 #include <Geom2d_TrimmedCurve.hxx>

src/BRepOffset/BRepOffset_MakeOffset.cxx

@@ -92,6 +92,7 @@
 #include <BRepAdaptor_Curve2d.hxx>
 #include <TopTools_DataMapIteratorOfDataMapOfShapeListOfShape.hxx>
 #include <Geom_SphericalSurface.hxx>
+#include <Geom_CylindricalSurface.hxx>
 #include <TopoDS_Wire.hxx>
 #include <BRepTools_Substitution.hxx>
 #include <Geom_TrimmedCurve.hxx>

src/BRepOffset/BRepOffset_Offset.cxx

@@ -186,8 +186,8 @@ static void UpdateEdge (const TopoDS_Edge& E,
 //=======================================================================
 
 static void ComputeCurve3d(TopoDS_Edge           Edge,
-			   Handle(Geom2d_Curve)  Curve,
-			   Handle(Geom_Surface)  Surf,
+			   const Handle(Geom2d_Curve)& Curve,
+			   const Handle(Geom_Surface)& Surf,
 			   const TopLoc_Location Loc,
 			   Standard_Real         Tol)
 {