No drug-references any more

Hi again,

I've taken the last feedback-round to heart and re-vamped the landing page for MetaExplorer, including a playground of the editor 📐🔧.

Hopefully this time I didn't include any drug references or other cringe-worthy stuff 😉. I'd be happy to hear your feedback! Especially I'd like to know if a node-editor is interesting to you, or if you prefer drag and drop, WYSIWYG-style editors.

The goal of the page is to collect feedback and raise interest in the open source project, on github and on youtube mostly.