root/pypi: links for dubins

root/pypi dubins-1.0.1.tar.gz
root/pypi dubins-1.0.0.tar.gz
root/pypi dubins-0.9.2.tar.gz
root/pypi dubins-0.9.1.tar.gz
root/pypi dubins-0.8.1.tar.gz
root/pypi dubins-0.8.tar.gz