Add Windows support

I went to give this very timely release a try, and but I've encountered a problem and I'm not sure what I might be doing wrong.

In my first cell, I've included:
%pip install davos
import davos

But that yields:

DavosError: Could not locate a 'pip' executable in the current Python environment. To ensure you have 'pip' installed in your environment [path to python install -m ensurepip]

Ensurepip finds pip appropriately and %pip list appropriately lists the packages in the respective environment.

I've tried this both inside and outside of conda containers with the same result.

Could you tell me what silly mistake I might be making?