Add support for cuDF

[codeananda]

First off, I love this library, you've done an awesome job for creating it!

Secondly, can you add support for cuDF dataframes?

[chris1610]

Thanks. Glad you find it helpful.

I'll need to look at the differences between cuDF and pandas dataframes. I'm aware of cuDF but have not used them. Let me look into it and see.

[beckernick]

Hi @chris1610 ! I just came across this issue due to the cuDF mention. This looks like a really cool project.

Happy to help answer any questions about cuDF if useful.