* support different env configs.

* fomrat code

* Hide doc

* Slightly rework the PR

* Remove .env in default template
* Use just one entry in the paths
* Unify env.js and loadEnv.js

* Oops, forgot these folks

* Makes end-to-end testing crash on unhandled rejections

* Comment fix

* mv create-react-app/index.js -> create-react-app/creteReactApp.js

* update to modern code style

* var -> cosnt

* set trailing-coma to es5 for prettier

* Refactor start script into modules

* Move dev server config into config file

* Replace eject file whitelist with a "remove-file-on-eject" flag

* Move utils into scripts folder (for inclusion in ejection)

* Add missed changes

* Pass showInstructions as an argument

* Fix eject bug

* Don't eject babelTransform

Resolves #1417 and #1498.

* 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