root/pypi: links for tw2-etc

root/pypi tw2.etc-2.1.0.tar.gz
root/pypi tw2.etc-2.0a3.tar.gz
root/pypi tw2.etc-2.0a2.tar.gz
root/pypi tw2.etc-2.0a1.tar.gz
root/pypi tw2.etc-2.0a0.tar.gz