Bazaar Explorer 1.0beta ready for testing

[Ian Clatworthy]

Nicholas Allen wrote:
> If I click refresh I get this crash:

>   File "/home/nick/.bazaar/plugins/qbzr/lib/treewidget.py", line 1460,
> in refresh
>     self.tree.lock_read()
> AttributeError: 'NoneType' object has no attribute 'lock_read'

This one was on my TODO list having been introduced in 0.11.0. I was
wondering when someone (else) would notice it. :-)

Fixed in rev 405.

Ian C.