Remove suppress from the TODO list

Suppress is fully handled in software in xf86-input-wacom now, and there
is no way to support hw-suppress in the evdev API.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Add a proper copyright header

And some other misc cleanups

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Some more cleanup

Signed-off-by: Hans de Goede <hdegoede@redhat.com>