Add a scope so we don't have to care about naming conflicts
and set the verison to 0.1.0 since we don't have a stable API yet.

We only want to export it in the package entry point and not
the generated bundle.

The demo now registers our web components lazily with a unique name
so that two different apps using the same underlying web compontens
don't clash.

This also disables auto registering and leaves that to the user.

So we get errors with older browsers.

Also use the same reference for removing the event handler, bind creates a new one.