Added
* names kwarg to CocoDataset.images / videos
* `DelayedImage.finalize` now accepts a `nodata` argument, which handles invalid
data pixels correctly under transformations.
* Toydata can now generate "multi-sensor" demodata.
Fixed
* CocoImage now returns None for `video` if it doesn't have one.
* BOIDS is now deterministic given a seed, which fixes toydata determinism
* Fixed toydata bug where data previously only drawn on first channel
Changed
* Tweaked default toydata settings