[MERGE] Reveal location of .bazaar in `bzr version`

[John Whitley]

Martin Pool wrote:
> Looks ok.  It might be nice to add a check for this in the version  
> blackbox tests but it's pretty trivial.

Are there blackbox tests for version?  There's no obvious standalone  
file for version command tests (ala 'blackbox/test_version.py').  I  
tried grepping around ('run_bzr.*version'), but haven't come up with  
anything that way either.

-- John