loongson/pypi: links for colordithering

loongson/mirror colordithering-0.7.tar.gz
loongson/mirror colordithering-0.6.tar.gz
loongson/mirror colordithering-0.5.tar.gz
loongson/mirror colordithering-0.2.tar.gz
loongson/mirror colordithering-0.1.tar.gz