[Pulp-list] user CLI addition pushed

[Mike McCune]

Also cleaned out some unneeded client code and pushed some common 
functions from the *_core classes up into basecore.py

Details:

http://bit.ly/d55XRQ

I tagged and built the latest pulp and my code refactor didn't seem to 
affect anything.  Can still list/add/remove everything I tried.

Mike
-- 
Mike McCune
mmccune AT redhat.com
Red Hat Engineering       | Portland, OR
Systems Management        | 650.254.4248