Removed all saturation/affectMat related things.

I'm making the switch to adventure mode.
As such, there will no longer be any saturation or affectMaterials. Gravity will still exist. And the grid will no longer be evaluated entirely every goddamn frame. Currently, it is set to the (0,0,200,200) rectangle (200x200 rectangle in the upper laft corner) for testing reasons. Everything is progressing nicely.