ENH: scipy.special: improving sph_harm function
ENH: scipy.special: Improved sph_harm function
Improved the speed and accuracy by writing the function in cython and using a different function for calculating associated Legendre polynomial
ENH: scipy.special: Improved sph_harm
GEN: scipy.special: regenate ufuncs
Adding backward compatibility to sph_harm for double type m and n
GEN: special: regenerated ufuncs file