Store complete-lines as hashes. Separate core.cljs from the concerns
of drawing a canvas. Remove mock app-state.
Remove debug statement.
Remove random character from ns declaration. Add color to slow-draw! invocations
Add the ability to delete lines from the draw loop.
Reorder functions to remove compiler warnings.
Fixing bugs from data structure refactoring.
Big bug with deleting lines and then adding new lines.
Fix global show/hide toggle after app-state refactor.
Experiment wrapping om component in let expression to set commonly
accessed values from the component state.