* progmodes/python.el: Bump defgroup :version to 24.3.
* progmodes/python.el (python-nav-end-of-statement): Rewrite in order to improve efficiency (Based on Daniel Colascione's <dancol@dancol.org> patch).
Update copyright notices for 2013.
* progmodes/python.el (python-nav-end-of-statement): Fix cornercase when handling multiline strings.
* lisp/progmodes/python.el: Enhancements to header documentation about skeletons.
* progmodes/python.el (python-shell-parse-command): Find python-shell-interpreter with modified environment.
* progmodes/python.el (python-pdbtrack-comint-output-filter-function): Enhancements on stacktrace detection. (thanks @gnovak)
Spelling fixes.
Fontify docstrings with font-lock-doc-face
Skip comments when fontifying docstrings
Cleanup docstring code

This is based on some work done for python-mode.el to speed it up.
Hopefully it does the same thing here.