Update jQuery demo to use the latest version of jQuery

We need to update the jQuery demo to use the latest version of jQuery. Steps include:

Download the latest version of the library, and place it in the examples/[library-name] folder. Minified files preferred, but non-minified works.
- The filename should include the version number in it (for example: jquery-3.0.0.min.js).
- For jQuery, we should see if we still need the jQuery-UI dependency, or if we can drop it.
Update the demo to use the updated library, including any necessary code changes to the demo.
Verify that the demo works across a sample of modern browsers (like Firefox, Chrome, Safari, and Edge).
- Follow the instructions here to run a test version of the site locally.
Commit your changes and submit a pull request.

sparkbox / bouncy-ball