a W "coordinate" that can be used for these.
This changes the type of wsmouse_input(). To avoid changing a lot of drivers
a compatibilty #define is provided. Maybe changing all drivers would have
been better?
- Wsmouse_input() get new argument 'flag', which indicates whether x/y/z are
relative or absolute.
- Wsmouse get new io controls, WSMOUSEIO_SCALIBCOORDS and
WSMOUSEIO_GCALIBCOORDS.