Draft: Fix contour htg
Fix contour HTG
- release comments, particularly on the PureMask aspect in HTG;
- complete owner condition in GetCornerCursors method on HTGNonOrientedMooreSuperCursor;
- fix contour HTG by using a concave hexahedron;
Waiting for the concave polyhedron which produces convex tetrahedrons conforming to other neighboring polyhedron (indicates in HTGContour by TODO).