Do we still need numpyeigen?

[alecjacobson]

Seems like pybind11 can directly interface to Eigen types. https://pybind11.readthedocs.io/en/stable/advanced/cast/eigen.html

So is numpyeigen no longer necessary?

[alecjacobson]

numpyeigen is doing codegen for the "matrix" of possible inputs, so that igl bindings work for {float,double} or {int32,int64} or {colmajor,rowmajor}

If there's a cleaner way to do this using pure pybind11 we should switch to it.