dokan:  add stub LockFile/UnlockFile functions
dokan:  add stub LockFile/UnlockFile functions

Without them MSWord fails hard.  Need to do a simple in-memory implementation.


git-svn-id: 74b2def6592cf29d88d1a5d33b5c4a2732d8507c@633 67cdc799-7952-0410-af00-57a81ceafa0f

pombreda/pyfilesystem-4