Otherwise, webpack will throw an error saying
it couldn't find entries.
That's because it couldn't find babel-loader and
other loaders installed into app's node_modules dir.

* Server JSON pages directly from the filesystem.

* Make Json pages even if there's an error.

* Implement much better page serving.

* Use JsonPagesPlugin in the production mode as well.

* Add gzip support for JSON pages.

* Use glob-promise instead of recursive-readdir

* Handle renderStatic 404 properly.

* Simply the gzip code.

* Cache already read JSON pages.

* Change JSON pages extension to .json.

* Fix HMR related issue.

* Fix hot-reload for .json solely on server.

* Properly clear cache on hot-reloader.

* Convert .js pages into .json page right inside the plugin.

* Fix gzipping .json pages.

* Remove unwanted json pages cleanup.

* Get rid of deprecated fs.exists for fs.access

* 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.

* Add AOT gzip content-encoding support.
Currently we only do this for
main.js and commons.js only.

* Remove unwanted await.

* Use Promise.all to gzip assets in parallel.

This is just my OCD, but this file is much easier on the eyes when apostrophes are used rather than primes. It's also proper, as the [prime](https://en.wikipedia.org/wiki/Prime_(symbol)) is used in mathematics, not written English.

* Clean up docs about next/babel

* Add suggestions from #553

* Add warning for multiple children in Link

* Add space after if

* Use proptype validation

* upgrade webpack

* fix WatchRemoveEventPlugin for webpack2

* use webpack2 for building for files

* bump webpack

* bump webpack

* monkeypatch watchpack

* compile _document using webpack

* don't emit the bundle file of _document.js

* exclude _document.js from minChunks of CommonsChunkPlugin

* handle creation/removal of pages/_document.js

* improve path handlings

* Add preact example.

* Update .babelrc