Reference ToC refactor (#3427)

* Reference ToC refactor

* Move Federation into Reference

* Fix ToC, add deprecation notice

* Fix Reference ToC

* tweak ToC

* Move content into Reference

* touch up kubectl

* fix ToC syntax error

* remove resources-reference docs

* change kubectl section name

* adjust page titles

* create Command-Line Tools section

* Move Federation API out to top level

* remove extensions/v1beta1 definitions

* rewrite Kubernetes API in Concepts in a later PR

* Add jbeda to Kubernetes API Overview page for reviews.

* incorporate feedback

* remove /docs/federation

* move around copy

* cleanup reference landing page

* update reference landing page

docs/admin/accessing-the-api.md

@@ -3,7 +3,7 @@ assignees:
 - bgrant0607
 - erictune
 - lavalamp
-title: Controlling Accessing to the Kubernetes API
+title: Controlling Access to the Kubernetes API
 ---
 
 Users [access the API](/docs/user-guide/accessing-the-cluster) using `kubectl`,

docs/admin/kubeadm.md

@@ -4,7 +4,7 @@ assignees:
 - luxas
 - errordeveloper
 - jbeda
-title: kubeadm reference
+title: kubeadm Setup Tool
 ---
 
 This document provides information on how to use kubeadm's advanced options.

docs/admin/kubelet.md

@@ -1,5 +1,5 @@
 ---
-title: Overview
+title: kubelet
 notitle: true
 ---
 ## kubelet