* Don't strip stack traces of evaluated webpack code

* Strip stack traces at the end of a string

because the last line doesn't always have a `\n` and `create-react-app` is leaving the last line of the stack traces present in the error messages

* code comment

* code comment

* Add syntax error overlay in development

* Support HMR being disabled

* Tweak CSS

* Extract some utilities into a separate package

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

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