added animation callbacks for all methods that use jQuery animations (fade)
trying simpler solution for animation callbacks
partway through simpler solution; must finish and commit again
finished "simpler solution"; visualize a house key with notches
added callback for passing score when quiz finishes
separated animationCallbacks from event methods
fixed animation callbacks for when "back" button is disabled
updated README with notes on new animation callbacks and event methods
merging cxelegance events and callbacks; documentation updates; closes #11, closes #14