Epcy

Add shuffle option to estimate a null distribution and find a threshold.

fix "read the docs" link

fix README

fix link for PyPI

* improve profile tool
* some fix
* improve unittest
* improve doc
* add cpmed normalization for single cell data
* improve memory usage (RawArray)
* add severals predictive scores (like ppv, npv, acc, ...)
* replace --subgroup by --condition and add --ref

Test GitHub action to publish a release on pypi