Figure legends

[rmzelle]

pandoc supports "Pictures with captions" (see http://johnmacfarlane.net/pandoc/demo/example9/pandocs-markdown.html ), but that won't work for GitHub Pages.

Currently I have been using
![Adding a tag in the Tags tab of an item.](screenshots/OSX-ZS-4.0.8-tag-tab.png)
but the text in this link ends up in the "alt" attribute of <img/>, which is only shown if the image can't be loaded. Somewhat better would be if we could populate the "title" attribute, which would show up as a tooltip, but I haven't found a way.

I guess we could either use straight HTML in our markdown and use the "title" attribute, or just add a caption-like description following the image, like:

![image](screenshots/OSX-ZS-4.0.8-tag-tab.png)  
**Adding a tag in the Tags tab of an item.**

(note the two spaces after the image to force a line break)

[adam3smith]

I don't like hard-coding the caption.
I'd actually be OK not having captions in the HTML and just having them in the PDF and ebook versions, which we'll generate with Pandoc anyway.
If you're really attached to captions in the HTML, my preferred version would be to run Pandoc locally after all, but we'd only have to do this towards the end.

[rmzelle]

Ok. I'll just keep my current format

![Adding a tag in the Tags tab of an item.](screenshots/OSX-ZS-4.0.8-tag-tab.png)

and be a bit more explicit in the text about describing what's in the various screenshots.