bazaar 1.3rc1 released

[Matt Nordhoff]

Martin Pool wrote:
> Your help is sought in testing the first release candidate of Bazaar
> 1.3.  Depending on test user feedback, this code will be released as
> Bazaar 1.3 at the end of the week.
> 
> Download now from:
> 
>   https://launchpad.net/bzr/1.3/1.3rc1
> 
> Changes in this release are shown below.

I think it's worth noting the .bzr.backup -> backup.bzr change in the
"notes when upgrading" section. It's not like people run "bzr upgrade"
frequently, but shell scripts to do so might need to be updated. Heck,
Launchpad will have to be updated, right?
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