Revert "Update all Angular libs (run update_all.sh)."

third_party/pkg/angular/example/README.todo.md

-Angular.dart's Todo Demo
-========================
-
-This demo is the most complete demo in the repository and a great
-starting point for quickly understanding Angular.dart
-
-Getting up and running
-----------------------
-
-To run this demo, first clone the entire Angular.dart repository.
-
-Then, run `pub serve` in this directory:
-
-```
-$ cd demo
-$ pub serve
-```
-
-Finally, open `http://localhost:8080/todo.html.`
-
-The server is optional
-----------------------
-
-There is a simple Node.js server in this directory, but you do
-not need to run it.  It is here to demonstrate the HTTP record /
-playback feature, snapshotting and dart2js.
-
-```
-$ cd example
-$ node webserver.js
-Web server is listening on port 3000
-```
-
-To use dart2js, open http://localhost:3000/todo.html in a non-Dartium web
-browser.
-
-To use snapshotting, open http://localhost:3000/snapshot/todo.html, which
-will serve a zip file with all the files used in the application.
-
-To use HTTP record / playback, first open http://localhost:3000/todo.html?record.
-Then, without restarting the server, open http://localhost:3000/todo.html?playback.
-
-For more awesomeness, use HTTP playback together with snapshotting to isolate your
-Dart application from the server. http://localhost:3000/snapshot/todo.html?playback