-migrated calc_circumcenter_circumsphere_tetrahedron_vectorized() from my repo to spherical_voronoi.py
-migrated calc_circumcenter_circumsphere_tetrahedron_vectorized() from my repo to spherical_voronoi.py

niknow/scipy,niknow/scipy,niknow/scipy,niknow/scipy,niknow/scipy,niknow/scipy