Docs need updating

[C-Lodder]

[C-Lodder]

@DGT41

• Shim = docs/_media/ce-loader.js
• Polyfill = https://cdnjs.cloudflare.com/ajax/libs/custom-elements/1.0.4/custom-elements.min.js

?

[dgrammatiko]

Shim is wrapped in a check for ES6 condition, so it's modified