Separates Integer value and Double value histogram iterators and iteration values.
Adds auto-sizing. Adds ConcurrentHistogram. Changes DoubleHistogram API to hide internal integer implementations.
Adds auto-sizing. Adds ConcurrentHistogram. Changes DoubleHistogram API to hide internal integer implementations.
Adds more efficient getIntervalHistogram(histogramToRecycle) API. Adds (faster) SingleWriter variants.
Updates tests
Bump version to 2.1.0-SNAPSHOT (includes API changes)