add new range boundaryfaces wich can take into account the boundary define on extended elt
up mesh::face info : the ghost faces are not really on boundary -> set on boundary only the ghosts face which are on the real boundary
build the extended doftable for the face view (M_face_l2g)
fix for the new range on boundaryfaces
fix for the new range on boundaryfaces
use the new range for extended elt
straighten the extended elt (maybe still a issue with edges in 3d for a particular case)