refactor prototype into library

[hoschi]

Umbrella issue for refactoring.

• which can then be used to integrate in editor
• separate logic for demo UI from core logic
• separate parser from state logic where possible

[hoschi]

Damn! A NPM package with name 'yode' already exists, but not listed at the search page. I contacted the owner, lets see if I can keep the name.

Check box in readme when package is published.

[hoschi]

Package published :100: https://www.npmjs.com/package/yode Big thanks to @jgmcelwain for giving me the name :heart: