insert_image_dimensions can break an image's aspect ratio

```
Currently images are sized only based on inline width/height attributes in the 
<img> tag.  It would be beneficial to some sites if the images could also be 
resized based on evaluating css.

One site that would benefit is http://www.nationstates.net.
```

Original issue reported on code.google.com by `jmara...@google.com` on 16 Feb 2011 at 4:49
