updated about page with new feature info

about.md

@@ -37,7 +37,14 @@ correspondence, but I will try to get back to you.
 
 This blog is generated using [Hakyll](http://jaspervdj.be/hakyll), a
 static site generator, and leans heavily on the generated sample
-site. The tags capability was added based on [this tutorial
-blog](https://javran.github.io/posts/2014-03-01-add-tags-to-your-hakyll-blog.html). I
-used emacs, git, and [gogs](http://gogs.io/) in the construction and
-maintenance of the site.
+site. The tags capability was added based on [this blog
+entry](https://javran.github.io/posts/2014-03-01-add-tags-to-your-hakyll-blog.html). Math
+support, via [MathJax](), was added based on [this blog
+entry](https://www.jdreaver.com/posts/2014-06-22-math-programming-blog-hakyll.html). The
+code to put the most recent post on the index page was adapted [from
+this
+code](https://github.com/lettier/lettier.github.io/blob/hakyll/build_deploy.hs).
+
+I used emacs, git, [the gimp](https://www.gimp.org/), and
+[gogs](http://gogs.io/) in the construction and maintenance of the
+site.