[LAD] Hydrogen - hihat foot pedal control

Hello Sebastian, A few weeks ago when discussed on the LAD a few enhancements for Hydrogen, one of them was to be able to switch between open, half-open and closed hihat samples when playing with the hihat foot control on an E-Drum. In this fork https://github.com/blablack/hydrogen I worked out the basic backend solution: - instruments can be set to be part of a hihat - if they are, they have a range associated that say to what level of foot control pressure they react - in the midi_input class, when a 'note on' is received, the method will check if the instrument is a hihat, check the foot pressure and change the note played to the one of the right hihat instrument if needed I still need to modify the GUI (at the moment I need to change the xml of the drumkit to be able to set that up), but if you could have a look at this to give me some feedback that would be great. Thanks in advance, Aurélien