root/pypi: links for stl-tools

root/pypi stl_tools-0.3.0.tar.gz
root/pypi stl_tools-0.2.2.tar.gz
root/pypi stl_tools-0.2.1.tar.gz
root/pypi stl_tools-0.2.tar.gz
root/pypi stl_tools-0.1.tar.gz