Note that this doesn't do anything yet, it's stubbed out everywhere except for
the button mapping bit where we already had some testing code from uLogitech.
This also adds the ID for the m570 trackball - a device I have available here.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
We'll use this to access Logitech unifying devices
Permission from Benjamin Tissoires and Olivier Gay to relicense this under the
MIT license.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
