message: docs: add BrowserStack badge to README.md
  PR Close
diff: [![Build Status](https://travis-ci.org/angular/angular.svg?branch=master)](https://travis-ci.org/angular/angular)
  [![CircleCI](https://circleci.com/gh/angular/angular/tree/master.svg?style=shield)](https://circleci.com/gh/angular/angular/tree/master)
  +[![BrowserStack Status](https://www.browserstack.com/automate/badge.svg?badge_key=LzF3RzBVVGt6VWE2S0hHaC9uYllOZz09LS1BVjNTclBKV0x4eVRlcjA4QVY1M0N3PT0=--eb4ce8c8dc2c1c5b2b5352d473ee12a73ac20e06)](https://www.browserstack.com/automate/public-build/LzF3RzBVVGt6VWE2S0hHaC9uYllOZz09LS1BVjNTclBKV0x4eVRlcjA4QVY1M0N3PT0=--eb4ce8c8dc2c1c5b2b5352d473ee12a73ac20e06)
  [![Join the chat at https://gitter.im/angular/angular](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/angular/angular?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
  [![Issue Stats](http://issuestats.com/github/angular/angular/badge/pr?style=flat)](http://issuestats.com/github/angular/angular)
  [![Issue Stats](http://issuestats.com/github/angular/angular/badge/issue?style=flat)](http://issuestats.com/github/angular/angular)
  @@ -23,7 +24,7 @@ Angular is a development platform for building mobile and desktop web applicatio
  Want to file a bug, contribute some code, or improve documentation? Excellent! Read up on our
  guidelines for [contributing][contributing] and then check out one of our issues in the [hotlist: community-help](https://github.com/angular/angular/labels/hotlist%3A%20community-help).
  -[browserstack]: https://www.browserstack.com/
  +[browserstack]: https://www.browserstack.com/automate/public-build/LzF3RzBVVGt6VWE2S0hHaC9uYllOZz09LS1BVjNTclBKV0x4eVRlcjA4QVY1M0N3PT0=--eb4ce8c8dc2c1c5b2b5352d473ee12a73ac20e06
  [contributing]: http://github.com/angular/angular/blob/master/CONTRIBUTING.md
  [quickstart]: https://angular.io/docs/ts/latest/quickstart.html
  [ng]: http://angular.io
  