Hi boys and girls,
I don't know if you noticed, but the repository has a new directory called "Viewer" : https://github.com/BabylonJS/Babylon.js/tree/master/Viewer
The viewer is a simple way of displaying a model without the need of JavaScript at all. It (obviously) uses babylon, and can be customized to your needs using HTML tags and HTML attributes.
The only two important lines in your page would be:
<babylon model="https://playground.babylonjs.com/scenes/Rabbit.babylon"&