ENH: scipy.special, Implemented Ellipsoidal harmonic function, the first kind

Here is an attempt to implement Ellipsoidal Harmonic Function (Lame's Function) the first kind.
The following DE is taken as the Lame's Equation
(s^2 - h^2)*(s^2 - k^2) d2E(s)/ds2 + s*(2*s^2 - h^2 - k^2) dE(s)/ds + (p - q*s) E(s) = 0
Other assumptions and references have been included in the Docs.















 
That's how the scipy.special automated ufunc generator mechanism works currently.
The function will in any case only be instantiated once.