Support for something like org-image-max-width

[Terje Larsen <terlar@gmail.com>]

There is already org-image-actual-width but the problem with that one is
that images that have quite small width, but are tall will be scaled and
become very tall.

I think it would make sense to introduce something like
org-image-max-width, which would scale images that are larger than this
width, but leave images within this width alone.

Another interesting thing would be to be able to adjust the max-width to
the width of the buffer, but not sure how well that will play in all
cases and how complex that would be.

Any thoughts on this?

Best regards,
Terje Larsen