[win32] Permission denied in fancy_rename

[Aaron Bentley]

John Arbash Meinel wrote:
> Anyway, I think get_bytes/put_bytes is good, but we should think about
> the memory impact.

Perhaps get_bytes/put_bytes should take/produce an iterable?  That would
ensure a low memory impact.

Strings, files, and string iterators are all iterables of strings, and
we can special-case files and strings if we want.

Aaron