build: adding basic e2e testing infrastructure

modules/playground/src/jsonp/app/jsonp_comp.ts

@@ -0,0 +1,20 @@
+import {Component} from '@angular/core';
+import {Jsonp} from '@angular/http';
+
+@Component({
+  selector: 'jsonp-app',
+  template: `
+    <h1>people</h1>
+    <ul class="people">
+      <li *ngFor="let person of people">
+        hello, {{person['name']}}
+      </li>
+    </ul>
+  `
+})
+export class JsonpCmp {
+  people: Object;
+  constructor(jsonp: Jsonp) {
+    jsonp.get('./people.json?callback=JSONP_CALLBACK').subscribe(res => this.people = res.json());
+  }
+}