v0.5.0

Skeletal animation (preview): rig a model into bones and animate it with
keyframes, posed right in the viewport and saved to roxlap's .rkc rigged-
character format. Formats and UI may still change.

Added

• Skeletal animation editor — build a rigged character (a skeleton of bones,
  each carrying its own voxel mesh) and animate it:
  • Rig a model: File ▸ New rig (one root bone) or Convert to rig (wrap the
    current model). Bones can be added, duplicated, reordered and deleted, with
    3-axis ball joints and a dummy root for full-body motion.
  • Three sub-modes: Sculpt (edit the active bone's mesh with the usual voxel
    tools), Skeleton (set each bone's joint / parent / rotation axis, or drag a
    bone in the viewport to place it), and Animate (preview and pose the clip).
  • Pose in the viewport: click a bone to select it, then left-drag to
    transform it on the selected keyframe — R / G / S switch the gizmo
    between rotate (trackball / ring), move and scale. Each keyframe stores a
    full per-bone transform (translation + rotation + scale).
  • Timeline (bottom bar): play / pause with Space, step keyframes with
    , / ., add / delete / copy / cut / paste keyframes, and drag a tick to
    retime it; a pose inspector edits the selected key's move / rotate / scale
    numerically.
  • Clips (left panel): add, rename and delete animation clips, set each
    clip's length, and toggle whether it loops.
  • Export to .rkc (File ▸ Export character); a .demiurg project stores
    the full rig too, and opening or dropping a .rkc loads it.
• Recent files: File ▸ Open recent reopens a recently used document, and the
  file dialog now remembers the last folder you used.
• The menu bar shows a build stamp — demiurg <version> · <commit> — so you
  can tell which version and git commit a binary was built from (selectable to
  copy into a bug report). Source-tarball builds with no git show unknown.

Changed

• Bumped roxlap to 0.13.0, which adds the roxlap_formats::character rigged-
  character container (per-keyframe translation + rotation + scale) the
  animation editor builds on.

Fixed

• Editing a rig or animation now marks the project unsaved (the title * and
  the quit guard), so posing / keyframing work can't be lost by quitting a
  document that still looked saved.