A buildout recipe which can be used to branch a Bazaar repository.
This makes it possible to automatically create branches for relevant
code.
Usage
=====
If you have a buildout config you can add a section like:
[sources]
recipe = bazaar
urls =
http://bazaar-vcs.org/bzr/bzr.dev bzr.dev
http://bazaar.launchpad.net/~bialix/heads/trunk heads
This will create a `sources` folder in you buildout root with two
subfolders in it (bzr.dev and heads).
Changes to you buildout configuration might trigger removal of the
sources dir. However, before this happens the recipe makes sure there
are no modifications left ...