root/pypi: links for ai4f

root/pypi ai4f-0.1.8.tar.gz
root/pypi ai4f-0.1.7.tar.gz
root/pypi ai4f-0.1.6.tar.gz
root/pypi ai4f-0.1.5.tar.gz
root/pypi ai4f-0.1.4.tar.gz