root/pypi: links for niftygen2

root/pypi niftygen2-2.1.1-py3-none-any.whl
root/pypi niftygen2-2.1.0.tar.gz
root/pypi niftygen2-2.0.1.tar.gz
root/pypi niftygen2-2.0.1-py2.py3-none-any.whl