Fixed bug generating negative image grids, that caused the negative image
to extend further from the protein and penetrate less deeply into pockets
than was intended.
Fixed a bug in the local optimization (done during docking or with a call
to OEScore.SystematicSolidBodyOptimize) that caused
the local rotations to be less evenly spaced than they could be. This bug
also affected the optimization done by the OEDock