docs(README): add analytics

Author: IgorMinar

README.md

@@ -38,3 +38,6 @@ To execute end-to-end (e2e) tests, use:
 
 To learn more about the grunt tasks, run `grunt --help` and also read our
 [contribution guidelines](http://docs.angularjs.org/misc/contribute).
+
+[![Analytics](https://ga-beacon.appspot.com/UA-8594346-11/angular.js/README.md?pixel)](https://github.com/igrigorik/ga-beacon)
+