Trying to fix missing endpoints of grid planes.  X, Y, and Z are each one short
Fixed Grid to set correct spacing… it was too large before and had an extra multiplier that set the diagonal between two points on a plane instead of the diagonal of two points on a voxel.  Also fixed to ensure that the environment box has +1 padding in every dimension otherwise organelle surfaces can be clipped.  Need to make this a keyword called from the environment.py