use pyculib for low-level wrappers?

[lebedov]

Continuum recently open sourced pyculib, which contains wrappers for CUBLAS, CUFFT, CUSPARSE, CURAND, and sorting algorithms provided by some other packages. This raises several possibilities:

• Having scikit-cuda depend on those could obviate the need to maintain separate low-level wrappers. Some libraries (e.g., CUSOLVER) are not yet supported, however.

• More generally, using the numba GPU infrastructure could potentially enhance interoperability with other packages.

[lebedov]

pyculib is no longer being developed in light of the availability of cupy.