Update 0.28 release notes

content/news/0.28-relnotes-ready.md

@@ -1,13 +1,20 @@
 
 ---
 date: 2017-09-25
-title: "0.28"
+title: "Hugo 0.28: High-speed Syntax Highlighting!"
-description: "0.28"
+description: "Chroma is the new default syntax highlighter in Hugo."
 categories: ["Releases"]
+slug: "0.28-relnotes"
+images:
+- images/blog/hugo-28-poster.png
 ---
 
 	Hugo `0.28` brings **blistering fast and native syntax highlighting** from [Chroma](https://github.com/alecthomas/chroma) ([fb33d828](https://github.com/gohugoio/hugo/commit/fb33d8286d78a78a74deb44355b621852a1c4033) [@bep](https://github.com/bep) [#3888](https://github.com/gohugoio/hugo/issues/3888)). A big thank you to [Alec Thomas](https://github.com/alecthomas) for taking on this massive task of porting the popular python highlighter Pygments to Go.
 
+Hugo has been caching the highlighter output to disk, so for repeated builds it has been fine, but this little snippet, showing a build of the [gohugo.io](https://gohugo.io/) site without cache and with both Pygments and Chroma, should illustrate the improvement:
+
+{{< asciicast Lc5iwTVny2kuUC8lqvNnL6oDU >}}
+
 Worth mentioning is also the `liveReloadPort`  flag on `hugo server`, which makes it possible to do "live reloads" behind a HTTPS proxy, which makes for very cool remote customer demos. 
 
 One example would be a Hugo server running behind a [ngrok](https://http://ngrok.com) tunnel: