GitLab

Remove std::array<VH,4> overload for TetTopo::add_cell: it lead to ambiguity when passing initializer lists

halfedges now need to be in circular order.

TopoKernel cleanup: use has_*_bottom_up_incidences() instead of *_bottom_up_, follow code style for *_deletion_ member vars

Before, the references were used to create a copy.