Added
* Add `.jp2` to known GDAL extensions.
* Add `soft_fill` to `Coords`, which aims to paint Gaussian blobs as coordinate
locations.
* Add `kwimage.padded_slice` ported and refactored from ndsampler.
* Add `reorder_axes` to `Coords`, which can change xy to yx representations etc...
* Added `Boxes.bounding_box` method
* Added quantize method to bounding boxes which pushes the left-top coordinates
to their floor and the right-bottom coordinates to their ceiling.
* `Detections.draw_on` can now accept color='classes'
* expose `thickness` in `Detections.draw_on`.
* Added `about` to Polygon and Coords scale and rotate.
* Add `to_geojson` to `PolygonList`
Fixed
* `kwimage.Detections` now correctly handles `None` data values. Previously
`None` was converted to an `array(None, dtype=object)`.
* demodata images now have the correct extension
* Fixed issue with channelless data in `Heatmap.draw_on`
* Bug in `Detections._make_labels` when scores are List[None]
Changed
* BREAKING: TLBR has been internally switched to LTRB
* Better Polygon coercion from geojson