root/pypi: links for usagi

root/pypi usagi-0.3.1.tar.gz
root/pypi usagi-0.3.1-py2.py3-none-any.whl
root/pypi usagi-0.3.0.tar.gz
root/pypi usagi-0.3.0-py2.py3-none-any.whl
root/pypi usagi-0.2.0.tar.gz
root/pypi usagi-0.2.0-py2.py3-none-any.whl
root/pypi usagi-0.1.1.tar.gz
root/pypi usagi-0.1.1-py2.py3-none-any.whl