Getting-started-guide cleanup.

Put a Prerequisites section in all the hosted gettting-started-guides.
Change how title and contents are formatted so they are not automatically
included in the ToC.  Tweak other section headers to improve ToCs.

docs/getting-started-guides/libvirt-coreos.md

@@ -1,19 +1,18 @@
-## Getting started with libvirt CoreOS
+Getting started with libvirt CoreOS
+-----------------------------------
 
-## Contents
+**Table of Contents**
 
-    - [Getting started with libvirt CoreOS](#getting-started-with-libvirt-coreos)
-    - [Contents](#contents)
-        - [Highlights](#highlights)
-        - [Prerequisites](#prerequisites)
-        - [Setup](#setup)
-        - [Interacting with your Kubernetes cluster with the `kube-*` scripts.](#interacting-with-your-kubernetes-cluster-with-the-kube--scripts)
-        - [Troubleshooting](#troubleshooting)
-            - [!!! Cannot find kubernetes-server-linux-amd64.tar.gz](#-cannot-find-kubernetes-server-linux-amd64targz)
-            - [Can't find virsh in PATH, please fix and retry.](#cant-find-virsh-in-path-please-fix-and-retry)
-            - [error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory](#error-failed-to-connect-socket-to-varrunlibvirtlibvirt-sock-no-such-file-or-directory)
-            - [error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied](#error-failed-to-connect-socket-to-varrunlibvirtlibvirt-sock-permission-denied)
-            - [error: Out of memory initializing network (virsh net-create...)](#error-out-of-memory-initializing-network-virsh-net-create)
+    - [Highlights](#highlights)
+    - [Prerequisites](#prerequisites)
+    - [Setup](#setup)
+    - [Interacting with your Kubernetes cluster with the `kube-*` scripts.](#interacting-with-your-kubernetes-cluster-with-the-kube--scripts)
+    - [Troubleshooting](#troubleshooting)
+        - [!!! Cannot find kubernetes-server-linux-amd64.tar.gz](#-cannot-find-kubernetes-server-linux-amd64targz)
+        - [Can't find virsh in PATH, please fix and retry.](#cant-find-virsh-in-path-please-fix-and-retry)
+        - [error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory](#error-failed-to-connect-socket-to-varrunlibvirtlibvirt-sock-no-such-file-or-directory)
+        - [error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied](#error-failed-to-connect-socket-to-varrunlibvirtlibvirt-sock-permission-denied)
+        - [error: Out of memory initializing network (virsh net-create...)](#error-out-of-memory-initializing-network-virsh-net-create)
 
 ### Highlights