Add Go in 5 minutes to the showcases

docs/content/showcase/goin5minutes.md

@@ -0,0 +1,12 @@
+---
+date: 2015-11-20T20:46:00Z
+description: "Code for Go in 5 Minutes Screencasts"
+license: "Apache License 2.0"
+licenseLink: "https://github.com/arschles/go-in-5-minutes/blob/master/LICENSE"
+sitelink: http://www.goin5minutes.com/
+sourceLink: https://github.com/arschles/go-in-5-minutes/tree/master/www
+tags:
+- screencasts
+thumbnail: /img/goin5minutes-tn.png
+title: Go in 5 minutes
+---