* Extract some utilities into a separate package

* Add utils dir to `files` in package.json

* Do not create an empty `utils` dir on eject

Fixes #702

* Load environment file via dotenv if .env file is present

* Document loading environment variables in .env file

* Minor doc tweaks

Fixes #410, #674

Fixes #532

* Update Jest

* Remove default snapshot test

* Fix a few things

* Add a simple default test

* App.spec.js -> App.test.js

* Fix e2e test

* Bump Jest