root/pypi: links for nb2md

root/pypi nb2md-0.1.7.tar.gz
root/pypi nb2md-0.1.6.tar.gz
root/pypi nb2md-0.1.5.tar.gz
root/pypi nb2md-0.1.4.tar.gz
root/pypi nb2md-0.0.25.tar.gz
root/pypi nb2md-0.0.24.tar.gz
root/pypi nb2md-0.0.23.tar.gz