root/pypi: links for number4

root/pypi Number4-4.0.0b6.tar.gz
root/pypi Number4-4.0.0b5.tar.gz
root/pypi Number4-4.0.0b4.tar.gz
root/pypi Number4-4.0.0b3.tar.gz
root/pypi Number4-4.0.0b2.tar.gz
root/pypi Number4-4.0.0b1.tar.gz