DOC: Add Python package installation docs to the README
DOC: Add Python package installation docs to the README

jhlegarreta/ITKCuberille,jhlegarreta/ITKCuberille,jhlegarreta/ITKCuberille,thewtex/ITKCuberille,InsightSoftwareConsortium/ITKCuberille,thewtex/ITKCuberille,thewtex/ITKCuberille,InsightSoftwareConsortium/ITKCuberille,InsightSoftwareConsortium/ITKCuberille