Add Gdevelop's online example to the readme?

[blurymind]

This is a bit of a game engine plug request in a way, but gdevelop is now using bondagejs for all story based games. I was wondering if it would be worth noting that in bondagejs readme - to demonstrate that it is used by game engines.

There is an online example game using it - probably the easiest way to experience bondagejs by non technical storytellers :)
https://editor.gdevelop-app.com/?project=example://dialogue-tree-with-yarn

also a wiki
http://wiki.compilgames.net/doku.php/gdevelop5/all-features/dialogue-tree#the_dialogue_tree_extension

and people are now starting to make tutorials
https://www.youtube.com/watch?v=jmcoT6Hh2QY
https://www.youtube.com/watch?v=ClLbN0wHTRA&vl=en

people are picking up and using bondagejs more and more

Another game engine that bundles bondage.js is ct.js