Create activity file for mkaburis-gitdemo

Author: jumainfomagnus

_slides/12-mkaburis-gitdemo.md

@@ -0,0 +1,9 @@
+---
+layout: slide
+title: "Welcome to our slide deck!"
+---
+
+Caption here
+
+![cooler-octocat](https://octodex.github.com/images/twenty-percent-cooler-octocat.png)
+{: .center}