Add to Default TechOrder

The plugin now registers itself with VideoJS as a default tech order option.
Yeah, we removed the thing that makes sure that native hls works.
A suggestion to what we can do:

```js
videojs.Hls.canPlaySource = function(srcObj) {
  var hls = mpegurlRE.test(srcObj.type);
  if (hls) {
    return !videojs.Html5.canPlaySource(srcObj);
  }
  return hls;
};
```