Merge branch 'master' of https://github.com/kubernetes/kubernetes.github.io into release-1.6

* 'master' of https://github.com/kubernetes/kubernetes.github.io: (62 commits)
  Move Guide topic: Admin Guide
  Move Guide topic: Resource Monitoring. (#2895)
  Move Guide topic: Service. (#2891)
  Move Guide topic: Connecting Apps with Services. (#2885)
  Move Guide topic: Federation Service Discovery. (#2884)
  Move Guide topic: Config Provider Firewalls. (#2883)
  Move Guide topic: Kubeconfig File
  Move Accessing Clusters topic to Concepts. (#2875)
  Move Guide topic: Sharing Clusters
  Move Guide topic: Prereqs
  Move Garbage Collection topic. (#2874)
  Move PetSets topic. (#2873)
  Move Guide topic: Pod Templates (#2872)
  Move StatefulSets topic. (#2869)
  Rename /docs/tasks/job/work-queue-1/
  Move Guide topic: Fine Parallel Processing using a Work Queue (#2870)
  Move Guide topic: Coarse Parallel Processing Using a Work Queue
  Move Init Containers topic. (#2866)
  Move Guide topic: Parallel Processing using Expansions (#2867)
  Move Pod overview. (#2865)
  ...

# Conflicts:
#	docs/api.md
#	docs/user-guide/jobs.md

_data/guides.yml

@@ -170,6 +170,7 @@ toc:
   section:
   - docs/admin/index.md
   - docs/admin/cluster-management.md
+  - docs/admin/upgrade-1-6.md
   - docs/admin/kubeadm.md
   - docs/admin/addons.md
   - docs/admin/node-allocatable.md