loongson/pypi: links for collective-downloadtracker

loongson/mirror collective.downloadtracker-1.0b1.zip
loongson/mirror collective.downloadtracker-1.0a4.zip
loongson/mirror collective.downloadtracker-1.0a3-py2.6.egg
loongson/mirror collective.downloadtracker-1.0a2-py2.6.egg
loongson/mirror collective.downloadtracker-1.0a1-py2.6.egg