Simplified rewrite of react-pie-menu

[12joan]

Hi everyone,

I've rewritten react-pie-menu to simplify the DOM structure, improve accessibility and use more modern React patterns. Unfortuantely, I don't have time to contribute these changes as a PR here or maintain them as a fork, but I've published them as part of my app's GitHub repo, which you can find here.

Example usage

Feel free to use these changes as you see fit. They're MIT licensed, so you can contribute them to react-pie-menu, publish them as a standalone package, or use them directly in your app. 😃