root/pypi: links for board2pdf

root/pypi board2pdf-1.9.1.tar.gz
root/pypi board2pdf-1.9.0.tar.gz
root/pypi board2pdf-1.8.0.tar.gz
root/pypi board2pdf-1.7.2.tar.gz
root/pypi board2pdf-1.7.1.tar.gz