loongson/pypi: links for pyetherchain

loongson/mirror pyetherchain-0.3.2.tar.gz
loongson/mirror pyetherchain-0.3.1.tar.gz
loongson/mirror pyetherchain-0.3.tar.gz
loongson/mirror pyetherchain-0.2.tar.gz
loongson/mirror pyetherchain-0.1.tar.gz