Allowed the periodical voronoi diagram using the -microstructure option to deal with rectangle of arbitrary size. Xmax, Ymax and Zmax are to be specified as entry 3 to 5 of the input file.

TODO : avoid topological unconsistencies for (e.g.) cones when
delaunay meshing is involved.

add fixme for bad position of high order face vertices.

Store the directions in the GFaces of the model to avoid recomputing them after the 3D meshing. These changes should have no impact unless the option R-tree (experimental) is selected.

use serendipity tetrahedron and haxahedron to compute high order interior vertices (instead of "unusual"... and now inexistant face-saturated incomplete element)

clean up high order routines by refactoring high-order tet/hex/prism/pyram generation code