Wrap additional functions in scico.scipy.special

[Michael-T-McCann]

(Adapted from a TODO left in the code.) We currently do not wrap lpmn or lpmn_values because they take integers as their first argument and ndarray as their last argument, and this does not work with the current _block_array_ufunc_wrapper.

[bwohlberg]

@Michael-T-McCann: Was this perhaps resolved in #259?

[Michael-T-McCann]

@Michael-T-McCann: Was this perhaps resolved in #259?

This is not resolved; these still aren't wrapped. However, I vote to close on the basis that I don't think the goal here should be to wrap every conceivable function, but rather to wrap the functions that somebody wants to use with block arrays.

[bwohlberg]

Fair enough. Closing for now.