root/pypi: links for collective-backtowork

root/pypi collective.backtowork-0.6.4.zip
root/pypi collective.backtowork-0.6.3.zip
root/pypi collective.backtowork-0.6.2.zip
root/pypi collective.backtowork-0.6.1.zip
root/pypi collective.backtowork-0.6.0.zip
root/pypi collective.backtowork-0.5.2.tar.gz
root/pypi collective.backtowork-0.5.1.tar.gz
root/pypi collective.backtowork-0.5.tar.gz