Pip package

[aviars]

I made this a package, pip installable, and so the scripts now work as installed scripts.

[jdkizer9]

Hi @aviars, I appreciate all the work on this, but this repo won't be actively maintained on our side, so I'm hesitant to create a package for it. The code is Apache 2.0 licensed, so feel free to either fork the repo or create a new one. Thanks!

[aviars]

The shc package is already in Pypi. I need this as a package to be part of our open source Django implementation. I also just modified this further to work with jwcrypto 1.0 instead of 0.8. This Incorporates changes in #8 PR too. for others reading this the repo is here. https://github.com/TransparentHealth/healthcards_python_sample_scripts. Install package with pip install shc