BLD: special: link _ufuncs against LAPACK
ENH: scipy.special: Implementation of ellipsoidal harmonic functions: first kind, the second kind and normalization constant
Improved documentation and testing, Testing of data using Knepley codes, Implementation of test with Electric Potential values, Improved implementation of ellipsoidal harmonics
Improved ellip_harm, Speed-up of ellip_harm_2 and ellip_normal, improved testing
MAINT: rename misc -> local in special/tests/data
GEN: special/tests/data: generate local.npz
GEN: special: regenerate ufuncs
DOC: special: fix up ellipsoidal harmonic docs
TST: special: silence some warnings in ellipsoidal harmonics tests
DOC: special: some clarifications to ellipsoidal harmonic docs
Merge pull request #4182 from pv/pr-3811

ENH: special: ellipsoidal harmonics

Implementation of ellipsoidal harmonic / Lame functions and associated normalization factors.