How to import a jsonp from a URL with a click.

[Jan]

Perhaps this is more a tiddlydev question:
> Hello everybody,
> in some Mails jeremy pointed out th ony way to Import a tiddler-like
> file from an file-system or url-address would be to use jsonp with a
> click. I still have not figured out, how to do this and I think it
> could be of great use.
> Promise: If someone builds the importer, I will build the exporter.
>
> Cheers Jan