v0.0.2

Fixes from a full review of the code (no crash, memory or audio-thread problem was found; each fix
below has a test that fails without it).

• Looper, no more clicks on a re-capture: a REC press, a Repeat change or a capture landing while
  a 5 ms crossfade was still under way cut it short. Most audibly: REC (Last) just after a bar line,
  or a Capture Next of the same length as the loop playing. Jumps now wait for the crossfade
  (at most 5 ms).
• Looper: switching Blend (Swap / Layer) glides instead of stepping; the looper's line says LOOP
  KEPT only while Hold keeps it.
• Grain: a held Mosaic started mid-slice played off the beat grid.
• Scenes: CHAIN's ON / OFF while editing a scene is locked in it (it was undone when the edit
  ended); REC's Hold stays on after an edit; loading a preset or an FX tile never plays half of it.
• Effects a scene fades in wake from cleared state after a rest: a compressor without its old
  gain reduction, a synced phaser without a stutter.
• Smaller: OTT lets its crossovers ring out; the EQ's cuts switch fully off at the ends of their
  ranges; a hand-edited value too big for its range reads as the maximum; a category tile tapped after
  a rescan opens its own category; SAVE and the preset scan wait less on the SD card.