Add iterative interpolation for splines in N-dimensions

[f0uriest]

[bmorris3]

Hi @f0uriest - this package does a lot of things that I need, thank you! Is this issue still in the to-do queue? I could really use a multilinear ND interpolator.

Thanks!

[f0uriest]

It's still on the list, but likely won't have time to do much on it in the near-medium time frame (weeks ~ months). If anyone else wants to take a stab I'd welcome a PR.

[Qazalbash]

I hope you're doing well! I'm interested in using Interpax for my research project, and it has been incredibly helpful so far. I was wondering if there are any plans to include an ND interpolator in the next release. It would be a great addition to my work.