1.2 additions for getting-started-guides/ and new non-Markdown files for user-guides

Author: John Mulhausen

_data/guides.yml

@@ -80,7 +80,11 @@ toc:
       - title: Fedora With Calico Networking
         path: /docs/getting-started-guides/fedora/fedora-calico/
       - title: rkt
-        path: /docs/getting-started-guides/rkt/
+        section:
+        - title: Running Kubernetes on rat
+          path: /docs/getting-started-guides/rkt/
+        - title: Notes on Different UX with rkt Container Runtime
+          path: /docs/getting-started-guides/rkt/notes/
       - title: Kubernetes on Mesos
         path: /docs/getting-started-guides/mesos/
       - title: Kubernetes on Mesos on Docker

docs/admin/garbage-collection.md

@@ -1,8 +1,9 @@
+---
+---
+
 * TOC
 {:toc}
 
-### Introduction
-
 Garbage collection is a helpful function of kubelet that will clean up unreferenced images and unused containers. kubelet will perform garbage collection for containers every minute and garbage collection for images every five minutes.
 
 External garbage collection tools are not recommended as these tools can potentially break the behavior of kubelet by removing containers expected to exist.