-voronoi_utility.py:
	-currently: trying to improve code performance based on practical profiling results
	-currently: working to numpy vectorize voronoi_region_vertices_spherical_surface() function (the partially vectorized intermediate state actually runs much more slowly than the original--hopefully the fully vectorized version will pay off)
	-the current commit provides ~25% performance improvement for the above function, but still not fully vectorized and probably still not as fast as the original dictionary loop-heavy version; also now has slightly reduced accuracy for one of the test cases, but that may be acceptable
Removing @profile decorator from previous commit.