Duplicate comics have different contests

[stsievert]

Edit: Some comics in have duplicate labels:

• 644 and 645
• 646 and 647
• 655 and 656
• 605 and 607

[stsievert]

Resolving this will mean basically subtracting 1 from a bunch of filenames (e.g., 650_summary_KLUCB.csv → 649_summary_KLUCB.csv).

[aawil]

Contests 646/647 and 655/656 also seem to share the same caption list (with different scores).

[stsievert]

Also 605/607