NEW FEATURE: added autogen icon to select music
NEW FEATURE: toggle for easter eggs in Machine Options
NEW FEATURE: marvelous step timing togglable in Machine Options
NEW FEATURE: Grade AAAA (all marvelous)
CHANGE: Only show ScreenHowToPlay if at least one player chose easy
WindowDancing and all its UI elements). All of the dancing UI elements
have been consolidated into the Player class, which simplifies things a
great deal. Steps and the classes that use them have been generalized
to use a variable number of panels (6 panel, 8 panel). Only a little more
work is needed on the ColorArrows portion of Player to fully support these
panel modes.