Rename *-multiframe-window to *-window-any-frame

Rename *-multiframe-window to *-window-any-frame

Suggested by Drew Adams.

* lisp/frame.el
(next-multiframe-window): Define as obsolete alias for...
(next-window-any-frame): ...new function name.
(previous-multiframe-window): Define as obsolete alias for...
(previous-window-any-frame): ...new function name.  (Bug#12436)

* lisp/term/ns-win.el (global-map): Use new command name.
* doc/emacs/windows.texi (Other Window): Document it.
* etc/NEWS: Announce it.