root/pypi: links for pcommerce-stock

root/pypi pcommerce.stock-1.0b3.tar.gz
root/pypi pcommerce.stock-1.0b2.tar.gz
root/pypi pcommerce.stock-1.0b1.tar.gz
root/pypi pcommerce.stock-1.0a4.tar.gz
root/pypi pcommerce.stock-1.0a3.tar.gz
root/pypi pcommerce.stock-1.0a2.tar.gz
root/pypi pcommerce.stock-1.0a1.tar.gz