Kubernetes 1.8 reference docs (#5632)

* Kubernetes 1.8 reference docs

* Kubectl reference docs for 1.8

* Update side bar with 1.8 kubectl and api ref docs links

docs/api-reference/v1.8/node_modules/highlight.js/lib/languages/julia-repl.js

@@ -0,0 +1,23 @@
+module.exports = function(hljs) {
+  return {
+    contains: [
+      {
+        className: 'meta',
+        begin: /^julia>/,
+        relevance: 10,
+        starts: {
+          // end the highlighting if we are on a new line and the line does not have at
+          // least six spaces in the beginning
+          end: /^(?![ ]{6})/,
+          subLanguage: 'julia'
+      },
+      // jldoctest Markdown blocks are used in the Julia manual and package docs indicate
+      // code snippets that should be verified when the documentation is built. They can be
+      // either REPL-like or script-like, but are usually REPL-like and therefore we apply
+      // julia-repl highlighting to them. More information can be found in Documenter's
+      // manual: https://juliadocs.github.io/Documenter.jl/latest/man/doctests.html
+      aliases: ['jldoctest']
+      }
+    ]
+  }
+};