-adjusted the method for generation of pseudo-random points for test_spherical_voronoi_surface_area_reconstitution(), which has been plagued by a pole-bias that inevitably tends to represent a rather pathological set of cases
-tried to use Muller's method based on suggestion from Joe --> Muller, M. E. "A Note on a Method for Generating Points Uniformly on N-Dimensional Spheres." Comm. Assoc. Comput. Mach. 2, 19-20, Apr. 1959. [and see: http://mathworld.wolfram.com/SpherePointPicking.html]
-the performance of the above unit test has improved substantially -- now tends to reconstitute > 99 % SA for a given random distribution of 5000 points on the unit sphere
-the new function, generate_random_array_spherical_generators(), also seems to work reasonably well by visual inspection of test results in ipynb
-the above function does, however, appear to retain sensitivity to the following issue (if not at increased frequency vs. before): AssertionError: By definition, a Voronoi vertex must be equidistant to at least 3 generators. [maybe invalid Voronoi diagram caused by nearly co-planar points in data set?]