* Examples: clarify language around Yarn create & npx
* add missing READMEs and create-next-app usage
* suggest people tag jthegedus in firebase related issues
* add yarn alt instructions
* cerebraljs example readme & fixes
* remove global npm install of create-next-app
* add npx to create-next-app command in examples
* add bash to shell snippets
* add yarn create to next-app command in examples
* fix READMEs named with lowercase
* change READMEs to use UPPERCASE
* [chore] styled-jsx-plugin-sass@0.2.0, show dynamic
styled-jsx-plugin-sass had an update that now allows for sass and
dynamic to live together.
This updates that package and updates the example slightly to show how.
* [fix] errant space in styled-jsx-scss example
