Add "Chargrid Roguelike Tutorial 2020" section for newsletter 13

Author: gridbugs

content/posts/newsletter-013/chargrid-roguelike-tutorial-2020.png

@@ -64,6 +64,25 @@ If needed, a section can be split into subsections with a "------" delimiter.
 
 ## Learning Material Updates
 
+### [Chargrid Roguelike Tutorial 2020][chargrid-roguelike-tutorial-2020]
+
+![Chargrid Roguelike Tutorial 2020](chargrid-roguelike-tutorial-2020.png)
+
+[Chargrid][chargrid] by [@stevebob][] is a collection of crates for building
+applications with text UIs that run in terminals, graphical windows, and web
+pages. It was made specifically with roguelike development in mind, though is
+general-purpose enough to be used for other applications.
+
+This is a tutorial series about making a traditional roguelike from scratch
+using chargrid for rendering and input handling. Reference code is available in
+[this git repo][chargrid-roguelike-tutorial-2020-reference-code]
+organized with one branch for each subsection.
+
+[chargrid-roguelike-tutorial-2020]: https://gridbugs.org/roguelike-tutorial-2020/
+[chargrid-roguelike-tutorial-2020-reference-code]: https://github.com/stevebob/chargrid-roguelike-tutorial-2020
+[chargrid]: https://github.com/stevebob/chargrid/
+[@stevebob]: https://github.com/stevebob
+
 ## Library & Tooling Updates
 
 ## Popular Workgroup Issues in Github