Change a return type, for greater extensibility. See

Change a return type, for greater extensibility.  See
http://lists.gnu.org/archive/html/emacs-devel/2007-12/msg01077.html
and its thread for discussion leading to this change.

* emacs-cvs/lisp/bookmark.el:
(bookmark-jump-noselect): Return an alist instead of a dotted pair.
(bookmark-jump, bookmark-jump-other-window, bookmark-insert)
(bookmark-bmenu-2-window, bookmark-bmenu-other-window)
(bookmark-bmenu-switch-other-window): Adjust accordingly.
(bookmark-make-cell-function): Adjust documentation accordingly.

* emacs-cvs/lisp/image-mode.el
(image-bookmark-jump): Adjust return type accordingly; document.

* emacs-cvs/lisp/doc-view.el
(doc-view-bookmark-jump): Adjust return type accordingly; document.