changes in python.el to support IPython

[Fabian Ezequiel Gallina]

Hi everybody,

I made several changes to python.el to support the IPython console.

I always preferred the standard Emacs version of python.el to this one
https://launchpad.net/python-mode but the IPython support was always
making me use the other.

Also, I really think that python's menu item "Start interpreter"
should execute `run-python' instead of `python-shell', mainly because
all the items below use that interpreter to work. With that said I
really don't understand why `python-shell' could be useful at all, my
guess is that it could be set as a defalias to `run-python'.


Regards,
-- 
Fabián E. Gallina
http://www.from-the-cloud.com

python.el.diff
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