root/pypi: links for curveball

root/pypi curveball-0.2.16.tar.gz
root/pypi curveball-0.2.16-py3-none-any.whl
root/pypi curveball-0.2.15.tar.gz
root/pypi curveball-0.2.15-py3-none-any.whl
root/pypi curveball-0.2.14.tar.gz