Hi,
I'm submitting this PR for consideration as a new example app showing Styled JSX with SCSS working inside and outside storybook with example components.
Only known issue: I noticed that when running this example with:
`$ yarn next ./examples/with-storybook-styled-jsx-scss`
I receive the following error:
```
error - ./pages/_app.js
Error: [BABEL] .../next.js/examples/with-storybook-styled-jsx-scss/pages/_app.js: Cannot find module 'styled-jsx-plugin-sass' (While processing: ".../next.js/node_modules/next/babel.js")
```
However I notice that this same missing module error is triggered when running this existing example app "with-styled-jsx-scss".
Any changes/tweaks needed?
Thanks!
