- sub-list of fields for rows - format string for rows - with or without headers
New routine to parse full BLAST result files. New script to split BLAST files containing many query results into many files each contaning one query result.
(added  around single value passed to set initialization).
Added special output filename 'stdout'.
Csv parser (featuring make_index(columns_key, columns_payload, blacklist_set)) Basic cross-referencer.
Moved helper read_blast into blast_parser.py.