loongson/pypi: links for django-versionfield2

loongson/mirror django-versionfield2-0.5.0.tar.gz
loongson/mirror django-versionfield2-0.4.0.tar.gz
loongson/mirror django-versionfield2-0.4.tar.gz
loongson/mirror django-versionfield2-0.3.3.tar.gz