Sorry, but this one isn't mine...

`jquery.ui.widget.js` is the jQuery UI widget factory... It's essentially the core component of jQuery UI that allows us to use the widget factory for making stateful plugins.
(Note, when talking about including jQuery UI, this was the only bit I'm includeing).

Btw, once we all of this clean up a little, we might want to list all included files with other licenses in the `README.md` file.