deleted semantics statistics (useless) and updated the reader with various fixes

updated notebook

delete old semantic_mask2former_swin_mapillary_converted files and use a semantic mapper directly

Seems to work. Implemented SemanticMapper in DronescapesRepresentation. Not fully generic, but good enough.

mask2former coco/mapillary

rm this too

remove m2f in test set

two mask2formes and one marigoldr

updates to task statistics

added task statistics, update collage

updates to depth_ufo top be (h,w,1) not (h,w,1,1)

npz files for edges_gb and depth_ufo

sotseg full

val set softseg

added notebook. Fixed 4 npz files that were broken. Small updates overall.

push the dataset.