refactor(http): move http files to top-level module

Closes #2680
Closes #3417

modules/angular2/src/http/static_request.ts

@@ -1,74 +0,0 @@
-import {RequestMethods, RequestModesOpts, RequestCredentialsOpts, RequestCacheOpts} from './enums';
-import {RequestOptions} from './base_request_options';
-import {Headers} from './headers';
-import {
-  BaseException,
-  RegExpWrapper,
-  CONST_EXPR,
-  isPresent,
-  isJsObject,
-  StringWrapper
-} from 'angular2/src/facade/lang';
-
-// TODO(jeffbcross): properly implement body accessors
-/**
- * Creates `Request` instances from provided values.
- *
- * The Request's interface is inspired by the Request constructor defined in the [Fetch
- * Spec](https://fetch.spec.whatwg.org/#request-class),
- * but is considered a static value whose body can be accessed many times. There are other
- * differences in the implementation, but this is the most significant.
- */
-export class Request {
-  /**
-   * Http method with which to perform the request.
-   *
-   * Defaults to GET.
-   */
-  method: RequestMethods;
-  mode: RequestModesOpts;
-  credentials: RequestCredentialsOpts;
-  /**
-   * Headers object based on the `Headers` class in the [Fetch
-   * Spec](https://fetch.spec.whatwg.org/#headers-class). {@link Headers} class reference.
-   */
-  headers: Headers;
-  /** Url of the remote resource */
-  url: string;
-  // TODO: support URLSearchParams | FormData | Blob | ArrayBuffer
-  private _body: string;
-  cache: RequestCacheOpts;
-  constructor(requestOptions: RequestOptions) {
-    // TODO: assert that url is present
-    let url = requestOptions.url;
-    this.url = requestOptions.url;
-    if (isPresent(requestOptions.search)) {
-      let search = requestOptions.search.toString();
-      if (search.length > 0) {
-        let prefix = '?';
-        if (StringWrapper.contains(this.url, '?')) {
-          prefix = (this.url[this.url.length - 1] == '&') ? '' : '&';
-        }
-        // TODO: just delete search-query-looking string in url?
-        this.url = url + prefix + search;
-      }
-    }
-    this._body = requestOptions.body;
-    this.method = requestOptions.method;
-    // TODO(jeffbcross): implement behavior
-    this.mode = requestOptions.mode;
-    // Defaults to 'omit', consistent with browser
-    // TODO(jeffbcross): implement behavior
-    this.credentials = requestOptions.credentials;
-    this.headers = new Headers(requestOptions.headers);
-    this.cache = requestOptions.cache;
-  }
-
-
-  /**
-   * Returns the request's body as string, assuming that body exists. If body is undefined, return
-   * empty
-   * string.
-   */
-  text(): String { return isPresent(this._body) ? this._body.toString() : ''; }
-}