ENH: Adding updates to window convergence function.
ENH: Adding updates to window convergence function.

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