loongson/pypi: links for presentationviewer

loongson/mirror PresentationViewer-1.0.15.zip
loongson/mirror PresentationViewer-1.0.15.tar.gz
loongson/mirror PresentationViewer-1.0.0a6.zip
loongson/mirror PresentationViewer-1.0.0a6.tar.gz
loongson/mirror PresentationViewer-1.0.0a5.zip
loongson/mirror PresentationViewer-1.0.0a5.tar.gz
loongson/mirror PresentationViewer-1.0.0a4.zip
loongson/mirror PresentationViewer-1.0.0a4.tar.gz
loongson/mirror PresentationViewer-1.0.0a2.zip
loongson/mirror PresentationViewer-1.0.0a2.tar.gz
loongson/mirror PresentationViewer-1.0.0a1.zip
loongson/mirror PresentationViewer-1.0.0a1.tar.gz