data/trec/: New curated TREC and IRC question datasets

We will switch in favor of these from the -single dataset.
Remove trecnew-single200.tsv, using 430+430 train/test curated dataset (based on TREC and IRC) instead
AnswerAnalysisAE, PassageAnalysisAE: Disable CAS debug dumps

We want general debug information, but this specifically is taking up
many gigabytes per run and slows down the evaluation to about half the
normal speed.