Re: MY window tree!

[martin rudalics]

> I have tried to add the hooks on reasonable places. I would be glad for
> some comments on that.

`winsav-after-get' and `winsav-after-put' should be defvard and the args
documented.  I'd also rename them to `before-winsav-functions' and
`after-winsav-functions' (compare `before-revert-hook' and
`after-revert-hook'), Juanma knows the naming conventions better.

But I notice that you still make overlays.  I thought we convinced you
they are not needed.  Believe me: The only case you should care about is
when an overlay has a 'window property referencing a window that has an
ovlwin-window association.  Investigating _all_ overlays in _all_ live
buffers is overkill and would make this very slow.