loongson/pypi: links for twentytab-previewadmin

loongson/mirror twentytab-previewadmin-0.5.tar.gz
loongson/mirror twentytab-previewadmin-0.4.tar.gz
loongson/mirror twentytab-previewadmin-0.3.tar.gz
loongson/mirror twentytab-previewadmin-0.2.tar.gz
loongson/mirror twentytab-previewadmin-0.1.tar.gz