loongson/pypi: links for ipyslickgrid

loongson/mirror ipyslickgrid-0.0.4.tar.gz
loongson/mirror ipyslickgrid-0.0.3.tar.gz
loongson/mirror ipyslickgrid-0.0.2.tar.gz
loongson/mirror ipyslickgrid-0.0.2a1.tar.gz
loongson/mirror ipyslickgrid-0.0.2a0.tar.gz