new reference genomes coming from NIST

NIST RM 8391 -- male of Eastern European Ashkenazic Jewish ancestry
NIST RM 8392 -- male son, father and mother who are a family of Eastern European Ashkenazic Jewish ancestry (with the son's genome being the same released as NIST RM 8391)
NIST RM 8393 -- male of East Asian (Chinese) ancestry
NIST RM 8375 -- genomes for four bacterial species: Salmonella typhimurium LT2, Staphylococcus aureus, Pseudomonas aeruginosa and Clostridium sporogenes