Incorporated the audio player

Rewrote the audio player to follow the same pattern as the other
methods. It now accepts right or left as a blockType. Also eliminated
the old audio player scripts file and stylesheet. Reduced bloat on the
audio player CSS by using some common classes. Also removed images
required for the audio player and base64ed them into the stylesheet.
Added the method to the readme. Also removed some unrelated unnecessary
stylesheets.