Maintain image size ratio

[jodal]

When images are wider than the page, they are made narrower without making them lower, distorting the image size ratio.

Example: http://docs.mopidy.com/en/develop/clients/http/#mopidy-lux

[snide]

The only way I could really solve this one when rst outputs height/width in style markup is to do this...

max-width: 800px
height: auto !important

It's ugly, but it'll work for docs that set unusually large widths on images. In general though I'd avoid setting widths and heights in your docs unless you happen to be aligning them left or right within the doc.