(find-function-regexp): Added :version 20.3.

(find-function-regexp): Added :version 20.3.
(find-variable-regexp, find-function-after-hook): Likewise.
(find-function-recenter-line): Likewise.
(find-function-recenter-line): Remove autoload cookie.
(find-function-do-it): Made more solid.  `save-excursion' around
call to `find-function-noselect'.  `find-function-other-window'
and `find-function-other-frame' point behaviour should be correct
now when function in a current buffer.
(find-function-setup-keys): New function to set up keybindings.