feat(http): add basic http service

This implementation only works in JavaScript, while the Observable transpilation
story gets worked out. Right now, the service just makes a simple request,
and returns an Observable of Response.

Additional functionality will be captured in separate issues.

Fixes #2028

modules/examples/e2e_test/http/http_spec.ts

@@ -0,0 +1,23 @@
+/// <reference path="../../../angular2/typings/jasmine/jasmine.d.ts" />
+
+import {verifyNoBrowserErrors} from 'angular2/src/test_lib/e2e_util';
+
+describe('http', function() {
+
+  afterEach(verifyNoBrowserErrors);
+
+  describe('fetching', function() {
+    var URL = 'examples/src/http/index.html';
+
+    it('should fetch and display people', function() {
+      browser.get(URL);
+
+      expect(getComponentText('http-app', '.people')).toEqual('hello, Jeff');
+    });
+  });
+});
+
+function getComponentText(selector, innerSelector) {
+  return browser.executeScript('return document.querySelector("' + selector + '").querySelector("' +
+                               innerSelector + '").textContent.trim()');
+}