Code review comment for lp:~luks/bzr/branch-switch

This patch adds a new option to bzr branch that allows to switch the checkout in the current directory to the new branch. This is based on yesterday's discussion in #bzr -- http://irclogs.ubuntu.com/2009/08/10/%23bzr.html from 19:48. Another option was to add a "source" argument to bzr switch -b (http://paste.pocoo.org/show/133506/), but the only way seems to be to add it to the end of the command line and "bzr <command> <target> <source>" is not used in any other bzr command except for bzr export.