Media Play

Supports video and audio playing. Currently, it is asynchronously initialized and starts playing as soon as buffered.

```javascript
    WSRAW.playMedia("http://www.scientificinvesting.eu/a/Beethoven%20-%20Symphony%20n.9%20Op.125%20'Choral'%20in%20D%20minor%20-%201%20Allegro%20Ma%20Non%20Troppo%20(Un%20Poco%20Maestoso).mp3");
```