Better non-standard shell integration support
Added python-shell-prompt-output-regexp to match the prompts
added before output in shells like iPython. With the value of
this variable the output generated for
python-shell-send-string-no-ouput is cleaned up.
Moved completion variables and bindings setup for shell to
inferior-python-mode definition.
Renamed python-shell-completion-strings-code to
python-shell-completion-string-code.
improved python-shell-completion--get-completions string
splitting.
Cleaned up some unecessary messages.
Better code sending need test for python-shell-completion-setup
python-ffap-setup and python-eldoc-setup.
Added example for iPython integration in the commentary section.