docs(demos): add segment demo

demos/component-docs/inputs/segment/pages.ts

@@ -0,0 +1,14 @@
+import {Page} from 'ionic/ionic';
+import {forwardRef} from 'angular2/angular2';
+import {AndroidAttribute} from '../../helpers';
+
+@Page({
+  templateUrl: 'inputs/segment/template.html',
+  directives: [forwardRef(() => AndroidAttribute)]
+})
+export class SegmentPage{
+  constructor() {
+    this.pet = "puppies";
+  }
+
+}