020749: EDF 1291 SMESH : Create 2D Mesh from 3D improvement

   int MakeBoundaryMesh(const TIDSortedElemSet& elements,
                        Bnd_Dimension           dimension,
                        SMESH_Group*            group = 0,
                        SMESH_Mesh*             targetMesh = 0,
                        bool                    toCopyElements = false,
                        bool                    toCopyExistingBondary = false,
+                       bool                    toAddExistingBondary = false,
+                       bool                    aroundElements = false);