returned by ZipFile.open() can now operate independently of the ZipFile even
if the ZipFile was created by passing in a file-like object as the first
argument to the constructor.

Original patch by Martin Panter.

This fixes tests on 8-bit locales (in particular on Windows).

Patch from Alex Gaynor.

current directory in current directory.

Wieland Hoffmann.

7159 instead of obsoleted RFC 4627.

collections module now accept the self keyword argument.

Suggested by James Lowden on docs@.

Patch by Charles-Axel Dein.