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/angular2/src/http/static_request.ts

@@ -0,0 +1,39 @@
+import {RequestMethods, RequestModesOpts, RequestCredentialsOpts} from './enums';
+import {URLSearchParams} from './url_search_params';
+import {RequestOptions, Request as IRequest} from './interfaces';
+import {Headers} from './headers';
+import {BaseException, RegExpWrapper} from 'angular2/src/facade/lang';
+
+// TODO(jeffbcross): implement body accessors
+export class Request implements IRequest {
+  method: RequestMethods;
+  mode: RequestModesOpts;
+  credentials: RequestCredentialsOpts;
+  headers: Headers;
+  /*
+   * Non-Standard Properties
+   */
+  // This property deviates from the standard. Body can be set in constructor, but is only
+  // accessible
+  // via json(), text(), arrayBuffer(), and blob() accessors, which also change the request's state
+  // to "used".
+  private body: URLSearchParams | FormData | Blob | string;
+
+  constructor(public url: string, {body, method = RequestMethods.GET, mode = RequestModesOpts.Cors,
+                                   credentials = RequestCredentialsOpts.Omit,
+                                   headers = new Headers()}: RequestOptions = {}) {
+    this.body = body;
+    // Defaults to 'GET', consistent with browser
+    this.method = method;
+    // Defaults to 'cors', consistent with browser
+    // TODO(jeffbcross): implement behavior
+    this.mode = mode;
+    // Defaults to 'omit', consistent with browser
+    // TODO(jeffbcross): implement behavior
+    this.credentials = credentials;
+    // Defaults to empty headers object, consistent with browser
+    this.headers = headers;
+  }
+
+  text(): String { return this.body ? this.body.toString() : ''; }
+}