v2.18.1

Spotymod 2.18.1

Reverb: the return is bounded and the bloom is playable.

- DECAY reads out as loop gain in percent, the way FLUX FB does, so the
  point where the room starts feeding itself is visible instead of found
  by ear. Unity moves to 0.80 and the top to 110%, giving the blooming
  region the last fifth of the knob -- it used to exist only at the very
  last point of the travel, where its speed could not be played at all.
- The return carries its own ceiling: a soft knee at 0.45, 7:1 above it,
  with a ride measured in seconds. Past unity the room settles where its
  own saturation puts it, not where the player put it.

New: the bloom duck. When the room's loop gain crosses unity the loop,
not the player, owns the level -- so the return envelope pulls the dry
bus back, sliding to -10 dB at the settled-bloom level. It arms on
regime, not on level, so an ordinary loud room never ducks. It rides in
seconds both ways (1.5 s in, 4 s out) and touches the dry sum only: the
send, the return and the excitation/deck taps are bit-identical.

NOTE: this remaps saved DECAY values -- 0.9667 was 103.3%, it is now
108.3%. The tooltip shows the figure, so the old sound is findable.