Fixed a bug where an object was not rendered to the shadowmap if it was camera culled.

Signed-off-by: Markus Tillman <reetopps6@hotmail.com>
Merge branch 'master' of https://github.com/Malow/NDYGFX
Direction of sunlight is now inverted it if points in negativ z-axis to counter "swapping" of near and far planes.

Signed-off-by: Markus Tillman <reetopps6@hotmail.com>