root/pypi: links for r2t2

root/pypi R2T2-0.3.1.tar.gz
root/pypi R2T2-0.3.0.tar.gz
root/pypi R2T2-0.2.0.tar.gz
root/pypi R2T2-0.1.2.tar.gz
root/pypi R2T2-0.1.1.tar.gz
root/pypi R2T2-0.1.tar.gz