Reword pod template concept information

- Mention address family in pod concept
  Preparing to reword this for IPv4 / IPv6 dual stack
- Fix capitalization for “cluster”, “container” and “volume”
  These are not resources you manage via kubectl
- Harmonize short descriptions for workload objects in glossary
- Expand definition of StatefulSet
- Use tooltip for “kubelet”
- Revise pod template text
- Revise What's Next section

content/en/docs/reference/glossary/deployment.md

@@ -4,7 +4,7 @@ id: deployment
 date: 2018-04-12
 full_link: /docs/concepts/workloads/controllers/deployment/
 short_description: >
-  An API object that manages a replicated application.
+  Manages a replicated application on your cluster.
 
 aka: 
 tags:
@@ -12,9 +12,10 @@ tags:
 - core-object
 - workload
 ---
- An API object that manages a replicated application.
+ An API object that manages a replicated application, typically by running Pods with no local state.
 
 <!--more--> 
 
-Each replica is represented by a {{< glossary_tooltip term_id="pod" >}}, and the Pods are distributed among the {{< glossary_tooltip text="nodes" term_id="node" >}} of a cluster.
-
+Each replica is represented by a {{< glossary_tooltip term_id="pod" >}}, and the Pods are distributed among the 
+{{< glossary_tooltip text="nodes" term_id="node" >}} of a cluster.
+For workloads that do require local state, consider using a {{< glossary_tooltip term_id="StatefulSet" >}}.