#10801: In zipfile, support different encodings for the header and the filenames.  Patch by MvL, test by Eli Bendersky.

Patch by John Chandler.

Add the missing __main__.py in the turtledemo package.  It seems to have been lost during some mass rename action (r86095).

Harmonize docstrings.  Move redemo from Tools/scripts to Tools/demo.  Add a README file to Tools/demo.

More cleanup: Move some demos into a dedicated Tools/demo dir, move 2to3 demo to Tools, and remove all the other Demo content.

There is a small chance of backward incompatibility here, but only for
non-SimpleCookie applications reading SimpleCookie generated cookies.  Even
then, any such ap is likely to be handling escaped values already, and it would
take a fairly perverse implementation of unescaping to fail to unescape these
newly escaped chars, so the risk seems minimal.

on Windows, and is no longer needed by any tests or Lib/test/support.py

existing and mentioned the OSError possibility.