Core Structure Implemented

What has been done

1. Basic wapper of Audio Element for audio control. (not support multiple sources yet)
2. Expose lifecycle hooks for the extension ability.
3. Added several ready to use visual effects.
4. Basic OO design of the visual elements on the canvas.

Next things to do

1. Loading methods need to be redesigned for a better experience.
2. More on OO design on canvas elements.