root/pypi: links for owl-tools

root/pypi owl-tools-0.4pre3.tar.gz
root/pypi owl-tools-0.4pre2.tar.gz
root/pypi owl-tools-0.4-pre.tar.gz
root/pypi owl-tools-0.3.tar.gz
root/pypi owl-tools-0.2.1.tar.gz
root/pypi owl-tools-0.2.tar.gz