[MERGE/RFC] Use Branch.pull() to update master branch.

[Ian Clatworthy]

Ian Clatworthy has voted approve.
Status is now: Approved


For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1235750652.5941.43.camel%40charis.vernstok.nl%3E
Project: Bazaar