include/CGAL/Mesh_3/Triangulation_mesher_level_traits_3.h to Mesh_2. - change its use to std::list to use of std::vector (and call reserve).
No header in this sub-directory, but Face_badness.h, is documented. They are internal headers of the Mesh_2 packages, and should not be used. If you want to use some undocumented functionnality, please contact me (Laurent Rineau <laurent.rineau@ens.fr>) so that we can see if I can move some internal details to the documented interface.