0024023: Revamp the OCCT Handle - gcc and clang

Adaptations for compiling with GCC 4.7 and 4.8:
- Construction semantics is used for Handle objects being initialized by const Handle objects of derived type, to avoid overload resolution error in GCC 4.7.
- Missing includes added.
- Fixed bugs related to misuse of direct casts of handle.
- Eliminate CLang warnings on uninitialized and unused variables, functions, and expressions

src/BRep/BRep_Builder.hxx

@@ -22,9 +22,14 @@
 #include <Standard_Handle.hxx>
 
 #include <TopoDS_Builder.hxx>
-#include <Standard_Real.hxx>
-#include <Standard_Boolean.hxx>
+#include <Geom2d_Curve.hxx>
+#include <Geom_Curve.hxx>
+#include <Geom_Surface.hxx>
 #include <GeomAbs_Shape.hxx>
+#include <Poly_Polygon3D.hxx>
+#include <Poly_PolygonOnTriangulation.hxx>
+#include <Poly_Triangulation.hxx>
+
 class Standard_NullObject;
 class Standard_DomainError;
 class TopoDS_Face;