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/optimist/test/parse_modified.js

@@ -0,0 +1,14 @@
+var optimist = require('../');
+var test = require('tap').test;
+
+test('parse with modifier functions' , function (t) {
+    t.plan(1);
+    
+    var argv = optimist().boolean('b').parse([ '-b', '123' ]);
+    t.deepEqual(fix(argv), { b: true, _: ['123'] });
+});
+
+function fix (obj) {
+    delete obj.$0;
+    return obj;
+}