Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.

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

@@ -0,0 +1,18 @@
+---
+title: Namespace
+id: namespace
+date: 2018-04-12
+full_link: /docs/concepts/overview/working-with-objects/namespaces
+short_description: >
+  An abstraction used by Kubernetes to support multiple virtual clusters on the same physical cluster.
+
+aka: 
+tags:
+- fundamental
+---
+ An abstraction used by Kubernetes to support multiple virtual clusters on the same physical {{< glossary_tooltip text="cluster" term_id="cluster" >}}.
+
+<!--more--> 
+
+Namespaces are used to organize objects in a cluster and provide a way to divide cluster resources. Names of resources need to be unique within a namespace, but not across namespaces.
+