Bugfixes

• Handle the case when you delete a file, and then rename another file on top of it. Also handle the case of bzr rm --keep foo. bzr status should show the removed file and an unknown file in its place. (John Arbash Meinel, #109993)
• Bundles properly read and write revision properties that have an empty value. And when the value is not ASCII. (John Arbash Meinel, #109613)
• Fix the bzr commit message to be in text mode. (Alexander Belchenko, #110901)
• Also handle when you rename a file and create a file where it used to be. (John Arbash Meinel, #110256)
• WorkingTree4._iter_changes should not descend into unversioned directories. (John Arbash Meinel, #110399)