* progmodes/octave.el (inferior-octave-strip-ctrl-g)
(inferior-octave-output-filter): Remove.
(octave-send-region, inferior-octave-startup): Fix callers.
(inferior-octave-mode-map): Don't use comint-dynamic-complete.
(octave-binary-file-extensions): New user variable.
(octave-find-definition): Confirm if opening binary files.
(octave-help-file): Use octave-find-definition to get the binary
confirmation.
(octave-help): Adjust for octave-help-file change.