Beta w/ Pro MK3 Support

This is just the sequencer update which adds support for the LaunchPad Pro MK3. The layout is taken from the same layout used by the other supported LaunchPad Pro. I did this for my own personal use. Only use this if you know what you are doing, support from my side is not a given. I am not responsible if anything breaks, so use at your own risk.

To update, follow the instructions here.