todo.txt

-- should event-handler and input-handler be combined? probably.
-- color only outer cubies
-- why isn't Animator#end working?
-- dynamic duration: speed up animation when typing quickly
-- allow switching between dimensions
-- make the site look nice
-- make sass not horrible
-- clicking on line helpers don't return correct normals
-- refactor "global" variables and importing them
-- dragging cubes seems off without velocity
-- robust-ify detecting click direction
-- should Grabber#raycast filter intersects? probably.
-- fill out rubiks cube innards
-- separate sass files
-- fix clicking on canvas then dragging off
-- there are two sets of logic for moving: mouse and keyboard. make one.
-- de-complexify storing and returning move data in rubiks-cube.js
-- demos don't loop
-- cache result in RubiksCube#solve, maybe?
-- use @typedef