adding creation of empty hair geometry to verify, added creation of hair geometry to static scene test
added hair to dynamic scene enable/disable test
added hair to update test
updates to mask test
bugfix in ray mask handling in occluded function of triangle4i_intersector1
bugfix in hit structure update of bezier1i_intersector4/8
extended packet write with hair geometry
extended nan tests with hair geometry support
added overlapping hair test
hair geometry tested in new/delete geometry test, bugfix in tri/bezierrefgen
added hair geometry to regression_static test
bugfix for bezier1i, vertex arrays got deleted but have to be kept
cleanups in accel generation in scene.cpp