[plugin] byteball.js

[nothingismagick]

Integrate and autoscaffold. Pay attention to this:

@neversaynever brought up the point that byteball.js “cannot perform validation of hashtree so it cannot check an address balance without having to trust a hub - therefore it looks like a lot of effort for something that doesn’t allow to build an app that cannot receive payments… cause you got no cryptographic proof that the received funds are real”