Refactor ideas

[C-Kenny]

Divide classes up into managed objects such as diamonds, bezier fins etc for easier state management

[C-Kenny]

• global state to be in classes
• split into separate files now that the visualizer is approaching > 1000 lines

[C-Kenny]

Moved global state initialization into own function. Visualizer has now reached > 1000 lines including comments.

[C-Kenny]

Moved global init state into own function, is now independent from setup(); which allows the Visualizer to be reset when a new song is loaded.

Changed in 7f0fc46

Moving the diamonds, fins, background states into their own classes structure still needs to be done.

[C-Kenny]

Now that we're getting to the stage of different foregrounds/backgrounds it would be nice to create "scenes" rather than toggling elements.

https://github.com/friedrichweise/Visualizer provides a good example of splitting into different scenes which are loaded depending on what state is desired.