* Introduce script tag based page loading system.

* Call ensurePage only in the dev mode.

* Implement router using the page-loader.

* Fix a typo and remove unwanted code.

* Fix some issues related to rendering.

* Fix production tests.

* Fix ondemand test cases.

* Fix unit tests.

* Get rid of eval completely.

* Remove all the inline code.

* Remove the json-pages plugin.

* Rename NEXT_PAGE_LOADER into __NEXT_PAGE_LOADER__

* Rename NEXT_LOADED_PAGES into __NEXT_LOADED_PAGES__

* Remove some unwanted code.

* Load everything async.

* Remove lib/eval-script.js
We no longer need it.

* Move webpack idle wait code to the page-loader.
Because that's the place to do it.

* Remove pageNotFound key from the error.

* Remove unused error field 'buildError'

* Add much better logic to normalize routes.

* Get rid of mitt.

* Introduce a better way to register pages.

* Came back to the mitt() based page-loader.

* Add link rel=preload support.

* Add assetPrefix support to add support for CDNs.

* Add assetPrefix support for preload links.

* Update readme.md