BlockwiseObjectClassification: Provide correct meta info for RegionFeatures output.
Also, fix a bug in execute related to output roi calculation.
Serializers: Use bigger sub-arrays when loading labels.
OpThresholdMasking: debug logging.
cluster: Cleaned up some bugs in secondary dataset outputs.
cluster: Fix compatibility check for primary and secondary output sub_block_shape
logging: Enable debug loggers for synapse pipeline applets.
Added a trivial applet for viewing precomputed label images (e.g. object predictions)
cluster: debug args.