N-D Voronoi diagram

`voronoin`

is based on Qhull [1]. For information, see `http://www.qhull.org/`

.

[1] Barber, C. B., D.P. Dobkin, and H.T. Huhdanpaa, “The
Quickhull Algorithm for Convex Hulls,” *ACM Transactions on Mathematical
Software*, Vol. 22, No. 4, Dec. 1996, p. 469-483.