[osg-submissions] Wacom Tablet Support

[Philipp Mächler]

Hi Robert

Thank you for including our changes :-)

At the moment we don't know cmake / making systems as good as needed
for resolve the library question.

Maybe we find a solution for the Xi-problem, maybe we'll make a
request on osg-users.. we don't know at the moment ;-)

regards,

Philipp.