* fixed binning for gpus in cases where #bins > work-group size (this simply iterates over all bins inside the kernel now, similar to what the rasterization kernel is doing)
 * removed camera "D0" TODO for orthographic rendering (this is not necessary, since the offset always has to be (0, 0); user programs will set the vertex "offset"/position inside transform programs, i.e. there is no and there should never be a global offset)