Wrap fd in a Python extension module

[blais]

It would be really great if this package would provide its functionality as a Python extension module.
I've seen instances of people calling subprocesses to "fd" in order to get a faster os.walk().
Just an idea,

[tavianator]

I think Python bindings to ignore would make more sense than fd, but that's not a bad idea. Definitely better than shelling out to fd