root/pypi: links for imgtests

root/pypi imgtests-2.5.tar.gz
root/pypi imgtests-2.4.tar.gz
root/pypi imgtests-2.3.tar.gz
root/pypi imgtests-2.2.tar.gz
root/pypi imgtests-2.1.tar.gz
root/pypi imgtests-2.tar.gz