root/pypi: links for crystaltoolkit-extension

root/pypi crystaltoolkit-extension-0.6.0.tar.gz
root/pypi crystaltoolkit-extension-0.5.0.tar.gz
root/pypi crystaltoolkit_extension-0.5.0-py3-none-any.whl
root/pypi crystaltoolkit-extension-0.4.0.tar.gz
root/pypi crystaltoolkit_extension-0.4.0-py3-none-any.whl
root/pypi crystaltoolkit-extension-0.3.0.tar.gz