Add styles for .figure and .caption
Take font size down from 22px to 21px
Delete period, so image is a block.
Fix autolink
Use markdown image instead of HTML. Now we can style images.
Regen using latest Frog and markdown parser.

Main change: markdown images on a line by themselves are treated as
block images and put with a caption inside a .figure div. We can style
them. So in many cases don't need to use HTML <img> tag anymore.