I wrote a [script](https://github.com/j0lv3r4/dependency-version-updater) to update dependencies recursively in `package.json` files, e.g.:
```
$ node index.js --path="./examples" --dependencies="react=^16.7.0,react-dom=^16.7.0"
```
This PR contains the result against the examples folder.
* Move route loading logic to a common place.
* Add router events.
* Add EventEmitter's core API methods.
* Add example app for loading events and docs.
* Fix some typos.
* Get rid of Router.ready()
* Remove events package.
It's already shipping with webpack.
* Handling aborting properly.
* Expose simple attribute based events listener API.
Removed the proposed event listener API from the public API.
* Remove error logged when there's an abort error.
There are many other ways to capture this error.
So, it doesn't look nice to print this always.
* Change router events to pass only the current URL as arguments.
* Add a section about Cancelled Routes to README.
