Docs: Add Humboldtux.net to Showcase page

docs/content/showcase/humboldtux.md

@@ -0,0 +1,14 @@
+---
+date: 2015-09-06T18:32:00Z
+description: Humboldtux personal website.
+license: ""
+licenseLink: ""
+sitelink: http://www.humboldtux.net/
+sourceLink: https://github.com/humboldtux/humboldtux.github.io
+tags:
+- personal
+- blog
+thumbnail: /img/humboldtux-tn.jpg
+title: humboldtux.net
+---
+