Minifreak with Added Keystep 37 Features

[Macaron Afterparty]

Adding the strum option as part of chord mode
Adding a series of chord shapes
Adding velocity sensitivity to number of notes played with strum function
Adding max number selection of chord notes

[Accretionist]

While we are at it use the shift functionality and keybed to be able to quickly change the MIDI output channel. This would be massively useful for using it as a MIDI keyboard (which I am doing). The sequencer lane (1-16) corresponding to the MIDI channel would then be temporarily lit up to indicate the channel selected.