Recommend pipx to install offlinedatasci

[abhidg]

Installing pipx (https://pipx.pypa.io) will be an additional step, but afterwards installing and updating offlinedatasci becomes simpler. Using pipx also ensures best practice such as installing binaries into a virtual environment.

Alternatives

• Keep using pip as now
• Give instructions to install offlinedatasci into a virtual environment

This should also bypass the long path error on Windows #119

[ethanwhite]

Is pipx appropriate since we also include a Python interface?

pipx replaces a subset of pip's functionality; it lets you install cli applications but NOT libraries that you import in your code.

https://pipx.pypa.io/latest/comparisons/

Given this I don't think this can be the only or primary recommendation, but I'd be happy to add a second install description that will work but only if using the CLI.

Note that #119 has been solved so pip now works for all OSs.

[abhidg]

Yes, we should include both. I think most people will use the CLI, so probably pipx first, with pip if they want to use it as a library.

[ethanwhite]

Thanks! Just opened a PR and requested a review. I left pip first since it is the default and doesn't require installing a package that will be new to many folks, but I restructured things so that pipx is immediately after and states that we recommend it for CLI install.s