root/pypi: links for freebarcodes

root/pypi freebarcodes-3.1.0.tar.gz
root/pypi freebarcodes-3.0a6.tar.gz
root/pypi freebarcodes-3.0a4.tar.gz
root/pypi freebarcodes-3.0a3.tar.gz
root/pypi freebarcodes-3.0a2.tar.gz
root/pypi freebarcodes-3.0a1.tar.gz
root/pypi freebarcodes-3.0a0.tar.gz