Maschine mk2 (not mikro) support

[monomadic]

Trying to use this with a regular maschine mk2. It kind of works, but I have to tweak the code a bit and a lot of buttons aren't supported.

I'm thinking of extending the lib to add support, should I just add a device in the devices module or is this ground that has already been walked?

[wrl]

You'll want to add a device in the devices module but also add whatever buttons you need here in the base module too.

As for switching between device types, just hardcode that or add a command-line flag for it or something for the time being. "Proper" support would involve looking at the USB vid/pid, which means bringing in sysfs or libudev, and that's just not necessary to start.

Note that the debounce algo for the pads is pretty awful right now, so maschine.rs doesn't actually feel great to play, but this is on my to-do list.

[wrl]

You may also want to modify the base Maschine trait and add idx parameters to the screen functions.