Translates accessions (from arguments or <stdin>) to NCBI taxonomy
IDs. The accession can be bare or in the fourth field of pipe notation
(e.g. "gi|12345|xx|ABC123.1|", ignoring fasta tag markers
[">"]). Inputs that are bare numbers will be assumed to be
taxonomy IDs already and preserved. Accessions with no taxonomy IDs in the
database will return 0.