loongson/pypi: links for ethercalc-python

loongson/mirror ethercalc-python-0.0.4.tar.gz
loongson/mirror ethercalc-python-0.0.3.tar.gz
loongson/mirror ethercalc-python-0.0.2.tar.gz
loongson/mirror ethercalc-python-0.0.1.tar.gz