cleanup(tooling): move tooling to the browser platform and rename profile into instrumentation

BREAKING CHANGE

Before

import * as p from 'angular2/profile';
import * as t from 'angular2/tools';

After

import * as p from 'angular2/instrumentation';
import * as t from 'angular2/platform/browser';

modules/angular2/src/http/backends/mock_backend.ts

@@ -1,4 +1,4 @@
-import {Injectable} from 'angular2/angular2';
+import {Injectable} from 'angular2/core';
 import {Request} from '../static_request';
 import {Response} from '../static_response';
 import {ReadyStates} from '../enums';