* python-eldoc-setup-code: The code to get help now uses the
inspect element. When an object doesn't have documentation and
if it is callable it returns the signature for it. Also when
an object does contain documentation it only returns the first
line.
* python-eldoc-at-point: has been simplified to just message the
doc header of objects.
* python-info-current-defun: was not taking into account the
current indentation so point was always inside a defun, even
if the indentation was less or equal than the defun above.