[Distutils] devpi-0.9.1: pushing tested releases to pypi

Hi all, devpi-0.9.1 is out which fixes bugs and introduces support for pushing a tested release candidate from a private index to pypi. See http://doc.devpi.net on the ease of doing "devpi upload", "test" and "push" commands as well as general information on the devpi-server and devpi tools. Thanks to all issue reporters and to Andi Albrecht for his pull request. best, holger