Allow to specify which controls to show as object

[lepe]

This only applies to ndjson-ui.js. Allow something like this:

const player = new NDJPlayer("video/running/running-640.ndjson", "#video", {
           controls :  {
                base : "common", //Which one to use as base
                play: false, //show play/pause
                stop: false,
                step: false,
                fullscreen: true,
                speed: true
            },
            fps: 20,
            loop: true,
            autoplay: false
});