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/axapta.js

@@ -0,0 +1,30 @@
+module.exports = function(hljs) {
+  return {
+    keywords: 'false int abstract private char boolean static null if for true ' +
+      'while long throw finally protected final return void enum else ' +
+      'break new catch byte super case short default double public try this switch ' +
+      'continue reverse firstfast firstonly forupdate nofetch sum avg minof maxof count ' +
+      'order group by asc desc index hint like dispaly edit client server ttsbegin ' +
+      'ttscommit str real date container anytype common div mod',
+    contains: [
+      hljs.C_LINE_COMMENT_MODE,
+      hljs.C_BLOCK_COMMENT_MODE,
+      hljs.APOS_STRING_MODE,
+      hljs.QUOTE_STRING_MODE,
+      hljs.C_NUMBER_MODE,
+      {
+        className: 'meta',
+        begin: '#', end: '$'
+      },
+      {
+        className: 'class',
+        beginKeywords: 'class interface', end: '{', excludeEnd: true,
+        illegal: ':',
+        contains: [
+          {beginKeywords: 'extends implements'},
+          hljs.UNDERSCORE_TITLE_MODE
+        ]
+      }
+    ]
+  };
+};