Updated JS URL's on test pages

Both jQuery and jQuery UI URL's were both returning 404's, new URLs will work if/when you accept this pull.

Also, all other libraries on GitHub were receiving a 302 due to a URL structure change, have corrected that too.

I am not sure if you are deliberately using GitHub rather than Google's CDN for the lower speed, otherwise I would probably suggest moving to Google to ensure longer term compatibility rather than relying on "ever changing" repos!