Python 3 support in python.el/python-21.el

[Dave Love]

This version of my Python mode provides support for the
recently-released Python 3.  There are separate modes for the
incompatible version 2 and version 3 languages (basically differing in
font-locking), and the support code for the inferior process has been
changed to run in either.  It also fixes some bugs and infelicities.
It's lightly tested; please report problems/deficiencies to me.  See the
URL in the headers for updates and the unchanged support code.

python.el.gz
Description: Emacs 22 mode

emacs.py.gz
Description: Python support code

python-21.el.gz
Description: Emacs 21 mode