Shell processes: enhancements to startup and CEDET compatibility.

Shell processes: enhancements to startup and CEDET compatibility.
* progmodes/python.el (python-shell-send-setup-max-wait): Delete var.
(python-shell-make-comint): accept-process-output at startup.
(run-python-internal): Set inferior-python-mode-hook to nil.
(python-shell-internal-get-or-create-process): call sit-for.
(python-preoutput-result): Add obsolete alias.
(python-shell-internal-send-string): Use it.
(python-shell-send-setup-code): Remove call to
accept-process-output.