Kwcoco

Added
* Caching mechanism for model hashids

Changed
* Minor improvements to confusion measures.
* AP / ROC curves now report real/support using concise SI for large numbers

Changed

* Removed old Python2 constructs
* Modified multisensor to use concise channel codes
* Moved `LazyGDalFrameFile` to `kwcoco.util.lazy_frame_backends` to experiment with different image subregion loaders

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

Added
* Added `add_auxiliary_item` to `CocoImage`
* `CocoImage.delay` can now handle the case where `imdata` is given directly in the image dictionary.
* `Measures.combine` now has a `growth` and `force_bins` parameter that works somewhat better
than the previous `precision` parameter.
* Add measure combiner helper classes
* Support for detaching `CocoImage` from the `dset` object (for multiprocessing)


Changed
* Split part of `confusion_vectors.py` into new file `confusion_measures.py`

Added
* Added "channels" argument to kwcoco subset

Fixed
* Bug in `delayed_load` when none of the requested channels exist

Changed
* Added more docs to demodata
* Moved eval CLI code to the cli module.


Fixed
* Annotation outside the image bounds now render correctly in the toydata module.
* Fixed issue in FusedChannelSpec where a unnormalized getitem did not work correctly