root/pypi: links for petgem

root/pypi petgem-0.9.tar.gz
root/pypi petgem-0.8.tar.gz
root/pypi petgem-0.7.tar.gz
root/pypi petgem-0.6.tar.gz
root/pypi petgem-0.5.tar.gz
root/pypi petgem-0.4.tar.gz