callout box images need lighter background color

[kanarb]

Example:

http://website.library.ucsc.edu/find/find-books

[knice]

Images in callout boxes aren't supposed to have a background color at all. The padding is set to 0, so there should be no visible background color.

I forgot to include the callout-full class in the style rule that resets images in callouts. I have corrected that.

So, I changed:

.callout-left img,
.callout-right img {
  margin:0; 
  padding:0;
}

to

.callout-full img,
.callout-left img,
.callout-right img {
  margin:0; 
  padding:0;
}