v3.4.1 (bug fix)
fix regression in v3.4.0: Function parsing always throws Error on Java 8 (see JDK-6609854);
modify TupleType.format behavior (now has hexadecimal offsets for row labels);
add public inner class TupleType.LabelMaker;
SHA-256 (headlong-3.4.1.jar): 383e20003222763ee4ec772a31bc115cb847638a3a403f548ca5fa9a4bf16372