* Better React Native Web support

* Adding better react-native-web support for jest testing

* Show warnings for builds

* Move WebpackDevServer helpers into react-dev-utils

* Override Jest config collectCoverageFrom with package.json

* Protect against overriding other options

* Better error message

* Create Jest config early on eject

* Tweak wording

* Dry it up

* Only run tests in <rootDir>/src (#544)

* updates Jest to 19.0.2

* removes testPathIgnorePatterns from jest config

* adds testMatch to jest config to only match files in src

* Bump babel-jest to 19.0.0 to match jest 19.0.2

* Upgrade to Jest 19

* Use testMatch

* Correct version

* Change proxy handling to allow multiple proxies to be specified in package.json.

* Up webpack-dev-server to 2.4.2

Webpack Dev Server version 2.4.2 handles the external websocket upgrade
for all proxies

* Fix the listen() call

* Switch to correct default host

* Remove promises and extract to react-dev-utils

* oops

* Tweak error and warning output

* Add a colon

* Add custom eslint formatter

* Add formatter docs

* Update formatter docs

* Slightly tweak it

* Update README.md

* Click to view source

* Update package.json

* Update package.json

* Fix lint

* Change proxy localhost to I27.0.0.1 for windows

* Update comment

* resolve localhost IP with DNS lookup on windows

* Fix CI errors

* Promisify addWebpackMiddleware

* Remove Node 6 syntax

* Update addWebpackMiddleware.js

* Actually use the resolved proxy

* 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

* 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 #410, #674