Comment and indent clean-up
Add variable names and revise comments
Add audio analyser to sounds
Change BPM options
Add jquery
Polyfill requestAnimationFrame
Change EDM option name
Create audio visualizer
Add audio visualizer canvas to DOM
Add modal for audio visualizer
Adjust visualizer zoom for drums
Adjust modal visualizer controls, layout and styling
Use native DOM selectors/uninstall jquery
Merge pull request #174 from davegw/feat/sound-visualizer

Complete sound visualizer feature