Merge from Dave Love's 2008-01-20 version.

Merge from Dave Love's 2008-01-20 version.
Require sym-comp.  Add Python buffer to same-window-buffer-names.
Fixup whitespaces.
(python-font-lock-keywords): Add highlighting for Python builtins.
(python-font-lock-syntactic-keywords): Rewrite.
(python-quote-syntax): Use syntax-ppss-context instead of parsing
ppss directly.
(python-mode-map): Add binding for python-find-function.
(python-calculate-indentation): Clean up the logic.
(python-beginning-of-defun): Explicitly set return value.
(python-beginning-of-statement): Stop looping if we get stuck
going backwards.
(python-next-statement): Stop looping if we somehow end up inside
a string while advancing.
(python-preoutput-continuation, python-version-checked): New vars.
(python-check-version): New function.
(run-python): Set default command to python-command instead of
python-python-command.
(run-python): Use python-check-version.  Give PYTHONPATH
precedence over data-directory in the process environment.  Load
function definitions in python process after.
(python-check-comint-prompt): New function.
(python-send-command, python-send-receive): Use it.
(python-complete-symbol, python-try-complete): Functions deleted.
Use symbol-complete instead of python-complete-symbol throughout.
(python-fill-paragraph): Further refine the fenced-string regexp.
(def-python-skeleton): Expand to the original abbrev instead if in
a comment or string.  Tweak skeletons for `if', `while', `for',
`try/except', `try/finally', `name'.
(python-pea-hook, python-abbrev-pc-hook): New functions.
(python-abbrev-syntax-table): New var.
(python-mode): Add python-pea-hook to pre-abbrev-expand-hook.  Use
symbol-completion-try-complete for hippie expansion.  Turn on font
lock unconditionally.
(python-mode-hook): Defcustom it.  No need to use make-local
variable on indent-tabs-mode in "Turn off Indent Tabs mode"
option, since it's buffer-local.