loongson/pypi: links for superdesk-server

loongson/mirror Superdesk-Server-0.1.6.tar.gz
loongson/mirror Superdesk-Server-0.1.5.tar.gz
loongson/mirror Superdesk-Server-0.1.5-beta.tar.gz
loongson/mirror Superdesk-Server-0.1.4.tar.gz