Simplified imports and refactored

[andreped]

As discussed in #13 (comment), I have simplified the imports, such that it works as expected. Simply use torchstain.MacenkoNormalizer(backend) as before, but works seemlessly with all backends.

As I believe this is now ready to be released, I also did some refactoring in the README and whatnot. I made a suggestion to edit the description of the tool in the README. You can edit as you please.

I set to merge with the backends branch. You can merge with main after if you approve of edits.

Changes:

• Simplied imports
• Renamed base subpackage to core
• Minor refactoring in README and code
• In 2022, I prefer pip over pip3

[carloalbertobarbano]

Thanks. I had some work started on this already, I will see tomorrow about merging them 👍

[andreped]

Thanks. I had some work started on this already, I will see tomorrow about merging them 👍

After taking a nap, I got an idea of how to solve the problem, and it seems like the nap worked :p Quite easy in the end. Just me being silly

[carloalbertobarbano]

Merged into the backends branch. I kept the "core" backage named to "base" as it is more appropriate for providing base classes.
I also moved the numpy implementation to its own backend package, for coherence with the rest of the codebase

[andreped]

I also moved the numpy implementation to its own backend package, for coherence with the rest of the codebase

Good idea. I was thinking about doing the same, but I was lazy :p