Coldtype

Added
- Better axidraw primitives in new `coldtype.axidraw` namespace, demonstrated in `test/visuals/test_axidraw.png`
- New `numpad` special variable that can handle up to 9 special actions, triggerable from the numpad with the viewer enabled
Removed
- Dependency on `PyOpenGL-accelerate` in the `[viewer]` extra — not really sure why that was there to begin with.

Added
- Better MIDI primitives
- `coldtype midi` midi viewer

Added
- Support for multi-return styler fn for `Glyphwise`
- Coldtype panel for `b3d_sequencer`

Added
- Support for single-char `Glyphwise`
- `Glyphwise` now returns `DATPens`, not `DraftingPens`

Added
- Support for `kp` and `tu` in `Glyphwise`

Added
- New features for managing meshes in BlenderPen
- embedded profiles, so `-p b3d` should now work globally
Removed
- `duration` keyword for `animation`, since it’s redundant to `timeline=<int>` shortcut