devpi-server-0.8.5: fixes, fewer dependencies for pypi caching server

[holger krekel]

Hi all,

just did a quick release of devpi-server 0.8.5, the pypi.python.org
caching server.  This should fix some cases of uninstallable packages 
and removes "pip" and "virtualenv" from its dependencies.  See

    https://pypi.python.org/pypi/devpi-server

for details.  Thanks to Markus Zapke-Gruendemann for some help
and to everybody for reporting issues.

cheers,
holger