docs(demos/platform): api demo

demos/platform/app.html

@@ -0,0 +1,2 @@
+<ion-nav id="nav" [root]="rootPage" #content></ion-nav>
+<ion-overlay></ion-overlay>

demos/platform/index.ts

@@ -0,0 +1,23 @@
+import {App, Page, IonicApp, Platform} from 'ionic/ionic';
+
+@App({
+  templateUrl: 'app.html'
+})
+class ApiDemoApp {
+
+  constructor() {
+    this.rootPage = InitialPage;
+  }
+}
+
+@Page({
+  templateUrl: 'main.html'
+})
+export class InitialPage {
+  constructor(platform: Platform) {
+    this.isIos = platform.is('ios');
+    this.isAndroid = platform.is('android');
+    this.userAgent = platform.userAgent();
+  }
+}
+

demos/platform/main.html

@@ -0,0 +1,16 @@
+<ion-navbar *navbar>
+  <ion-title>Platform</ion-title>
+</ion-navbar>
+
+<ion-content padding>
+
+  <ion-row>
+    <b>.is('android'):</b> {{isAndroid}}
+  </ion-row>
+  <ion-row>
+    <b>.is('ios'):</b> {{isIos}}
+  </ion-row>
+  <ion-row>
+    <b>.userAgent():</b> {{userAgent}}
+  </ion-row>
+<ion-content>

ionic/platform/platform.ts

@@ -13,6 +13,7 @@ import {ready, windowDimensions, flushDimensionCache} from '../util/dom';
 
 /**
  * TODO
+ * @demo /docs/v2/demos/platform/
  */
 export class Platform {