v0.2 curation: remove superseded shards left by the previous partitioning

v0.2 mini: visual-QA prompt curation (143 -> 134 prompts; see prompts/v02_excluded.txt in the code repo)

Release v0.2 seed-disjoint in-domain splits (part 3)

Release v0.2 seed-disjoint in-domain splits (part 2)

Release v0.2 seed-disjoint in-domain splits

mini config (64px colour+seg+labels) (part 2)

mini config (64px colour+seg+labels)