Changes

- build improvements
- drop use of GLU functions
- rationalise/unify ::Objects classes
- trigrid3d $colours is now per-vertex
- coordinate inputs now converted to float, so pass right type if want flow
- add labels3d, arrows3d
- compatibility break: requires OpenGL 3.3 (from 2010)
- now uses OpenGL::Modern
- `demo 3dgal` Mandelbrot entries now native complex

2.102 2025-04-11
- fix scrolling out with mousewheel/double-touch-scroll in GLUT
- add support for POGL_WINDOW_TYPE of glfw, which is now default
- add own text rendering, now Helvetica
- add own sphere-rendering, removing dependency on GLUT

2.101 2025-04-08
- non-trivial tests added
- add overloads of ::Quaternion
- change mouse control from ArcBall-like to orbiting-camera-like
- convert event-handling from X-windows style to generic

2.100 2025-01-16
- adjust MathGraph and Labels so Debian packaging is happy

2.099 2025-01-06
- add licence information

2.098 2025-01-04
- Graphics::TriD::Rout::{combcoords,attract,repulse} moved to ImageND

2.097 2024-12-09
- install pdldoc, add repo metadata

2.096 2024-12-04
- split out from PDL 2.095