[MERGE] Implement bzrlib.lock with CreateFile rather than LockFileEx on win32 (operational part)

[Bundle Buggy]

Bundle Buggy has detected this merge request.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3Cd80792120906190310p78d4c7e6t2b2bb64174467bac%40mail.gmail.com%3E
Project: Bazaar