Urlimport

user_agent string

- added a hg repository on bitbucket:
http://bitbucket.org/alexbodn/urlimport
- added a pypi entry: urlimport. jurev is co-maintainer.

p4import.
- the perforce connections are being cached by path, to allow
multiple connections to be cached.
- removed p4conn from settings.
- built a standard package for deploying on pypi.

with python version ($major.$minor), so a host may serve
modules for different python client versions
- allow setting of a custom user agent header. don't know how
to test from server side.
v0.80b 2010-04-15 - reduced actions performed when a afile hasn't expired.
v0.80a 2010-04-15 - expires finally tested (and heavily fixed).