bzr-p4: Perforce foreign branches for Bazaar

[Ian Clatworthy]

Matt McClure wrote:
> Ian,
> 
> Please do add me to the fastimport team.  I'm not certain how much
> I'll use it in the near term, but at least I'll be able to check it
> out some more.

Done.

> I've started covering git-p4 with some tests.
> (http://mlm.webfactional.com/bzr-p4)

That's great news. Interest in Darcs imports has increased lately
so it will be good when fastimport supports them in a robust manner.

Ian C.