0025039: Improvement of code structure of general and supporting tools implemented in BRepMesh

Removed CDL declarations; Data collections are replaced by NCollections; Small code refactoring.
Remove definition of BRepMesh class. Code refactoring of BRepMesh_IncrementalMesh.
Function BRepMesh_Write storing BRepMesh_DataStructureOfDelaun to BRep file is added for debug needs.
Static method BRepMesh_GeomTool::IntLinLin has been added to eliminate code duplications in BRepMesh_Dealun and BRepMesh_CircleTool.
BRepMesh_CircleTool simplified method to find circumcircle.

Fix merging conflicts
Remove redundant function
Fix compilation warning on MacOS
Revert changes occurred during rebase
Resolved merging conflicts
Use parallel flag with BRepMesh_FastDiscret

Test cases for issue CR25039_2

src/VrmlConverter/VrmlConverter_ShadedShape.cxx

@@ -24,7 +24,6 @@
 #include <Poly_Triangle.hxx>
 #include <Poly_Triangulation.hxx>
 #include <BRepTools.hxx>
-#include <BRepMesh.hxx>
 #include <BRep_Tool.hxx>
 #include <gp_Pnt.hxx>
 #include <gp_Vec.hxx>
@@ -52,7 +51,7 @@
 #include <Vrml_NormalBinding.hxx>
 #include <Vrml_Separator.hxx>
 #include <Vrml_NormalBinding.hxx>
-
+#include <BRepMesh_IncrementalMesh.hxx>
 
 //=========================================================================
 // function: Add
@@ -98,8 +97,11 @@ void VrmlConverter_ShadedShape::Add( Standard_OStream& anOStream,
 	theRequestedDeflection = aDrawer->MaximalChordialDeviation(); 
       }
 
-    if (!BRepTools::Triangulation(aShape,theRequestedDeflection)) 
-      BRepMesh::Mesh(aShape,theRequestedDeflection); // computes and save the triangulation in the face.
+    if (!BRepTools::Triangulation(aShape,theRequestedDeflection))
+    {
+      // computes and save the triangulation in the face.
+      BRepMesh_IncrementalMesh(aShape,theRequestedDeflection);
+    }
   
   
   Handle(Poly_Triangulation) T;