Groovy Palette & Frames 0.3.0

• USE ADVANCED (TINT) — the palettes now ride the engine's ADVANCED
  colorization instead of replacing it.

  ADVANCED is not a four-shade mode: it is the pokered-gbc pack, which
  resolves a real colour per tile and keeps eight background palettes
  live at once. Picking RAINBOW used to switch that off and hand you four
  shades — measurably a downgrade.

  A four-rung ramp can be read as a curve rather than four steps: take
  each colour's luminance, find that height on the ramp, interpolate
  between the two rungs it falls between. Counted on the real pack, on a
  house interior:

  	on screen	across the game
  ADVANCED	18	47
  RAINBOW, before	4	4
  RAINBOW, riding ADVANCED	18	47

  Nothing is collapsed — the counts match ADVANCED's exactly. And the
  source's own hue distinctions survive: a green tile still reads greener
  than a red one, both pulled into the palette's family.

  TINT	keep ADVANCED's colour, pull it toward the palette (default)
  FULL	all the way onto the ramp, but along the curve
  OFF	what 0.2.0 did — four shades, ADVANCED replaced

  Installs without the pokered-gbc pack fall back to OFF on their own.