-removed a superfluous usage of np.array() in calculate_and_sum_up_inner_sphere_surface_angles_Voronoi_polygon() as suggested by CJ Carey
-removed a superfluous usage of np.array() in calculate_and_sum_up_inner_sphere_surface_angles_Voronoi_polygon() as suggested by CJ Carey

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