PENDING changes

## from changes-20210321-20210406.txt
- all tabbed & tab widget functions

## from changes-20210406-20210410.txt
bindgen add:
- [ ] ncdirect_stream
- [x] ncplane_as_rgba
- [ ] nclane_pixelgeom
- [ ] ncvisual_blitter_geom
- [ ] ncvisual_geom
bindgen del
- [x] ncplane_rgba

static add:
- [ ] ncplane_rgba
- [ ] ncvisual_geom
static del:

## ...