add null hash for performance testing
add documentation for null hash digest in bamseqchksum
bump libmaus version
refactor and add sha512primesums hash
add documentation for sha512primesums hash digest in bamseqchksum
bump version after adding sha512primesums digest in bamseqchksum
Merge branch 'experimental' into experimental-debian
bump version after adding sha512primesums digest in bamseqchksum