ENH:  Add slice-by-slice script.
ENH:  Add slice-by-slice script.

stnava/ANTs,stnava/ANTs,dawnsong/ANTs,dawnsong/ANTs,stnava/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,dawnsong/ANTs,dawnsong/ANTs,dawnsong/ANTs,stnava/ANTs,fbudin69500/ANTs,stnava/ANTs,fbudin69500/ANTs