[MERGE] Change the signature on VersionedFiles adapters to allow less typing and more flexability inside adapters.

[Bundle Buggy]

Bundle Buggy has detected this merge request.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1234733203.7169.74.camel%40lifeless-64%3E
Project: Bazaar