* Initial changes to expose "real" MIDI velocity
* Change MI_VELU and MI_VELD to fit new logic
* Apply cleanups from fauxpark's review
my bad on the errant whitespace and else {} placements
* Slight changes to MI_VELD to match values when velocity is falling to when it is rising
* Add keycode MI_VEL_0
* Update compute_velocity() to handle MI_VEL_0
* Store velocity as 7 bits to hard cap value at 127
bf84d35117