* add support for midi drums
* rb3drums: use dpad to disambiguate cymbal/drum hits instead of staggering.
* rb3drums: configurable min velocity and hihat up behavior
* rb3drums: configurable combos, combo duration, note overrides
* rb3drums: move config to separate file.
* rb3drums: apply stagger to double cymbal hits
* rb3drums: support midi CC note mapping
* rb3drums: add config to cmakelists. only load rb3drums config once.
* rb3drums: HihatWithPedalUp defaults to yellow cymbal instead of blue
