buttons 1-3 and 5 now working on 4d mouse, rotation and wheel making
more sense (albeit wrongly formatted for the driver)
isolating transforms, improving pressure readings.
now handling all 4d mouse buttons correctly
Now reporting sensible rotation at host side, 0 <= x <= 360 degrees
Oddly, rotation appears to be positive anticlockwise.  This might
well be wrong, need to test with an app that handles rotation.
4d mouse wheel reporting reasonable values, sign is obviously
wrong (always -ve)