[MERGE] Update VersionedFileStore for the changes to VersionedFile

[Robert Collins]

This removes a bunch of transaction stuff from VersionedFileStore now
that VersionedFiles that are around detect their validity automatically.

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: api-cleanup-3322.patch
Type: text/x-patch
Size: 23277 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080408/621ab90d/attachment-0001.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080408/621ab90d/attachment-0001.pgp