(winner-mode, winner-save-unconditionally)
(winner-hook-installed-p): Save window configuration after
every command if window-configuration-change-hook is not present.
(winner-save-new-configurations, winner-insert-if-new):
Compare a new window configuration
with the previous configuration before saving it.
(winner-insert-if-new, winner-ring)
(winner-configuration, winner-set): Save buffer list together
with the window configurations, so that windows that can no
longer be correctly restored can instead be deleted.
(winner-undo): Compare restored configuration
with other configurations that have been reviewed and skip
this one if it looks similar.
(winner-insert-if-new, winner-save-new-configurations)
(winner-save-unconditionally): Just save the final
configuration if the same command (changing the window
configuration) is applied several times in a row.
(winner-switch): Removed the command
`winner-switch' (and the variables connected to it), since
because of the change above, any "switching package" may now
be used without disturbing winner-mode too much.
(winner-change-fun): Removed the pushnew
command, so that `cl' will not have to be loaded.
(winner-set-conf): Introduced "wrapper" around
`set-window-configuration', so that `winner-undo' may be
called from the minibuffer.
