root/pypi: links for silvermirror

root/pypi silvermirror-0.5.2.tar.gz
root/pypi silvermirror-0.5.1.tar.gz
root/pypi silvermirror-0.5.tar.gz
root/pypi silvermirror-0.4.tar.gz
root/pypi silvermirror-0.3.tar.gz
root/pypi silvermirror-0.2.3.tar.gz