Synopsis
		sfortho < fnoi.rsf sig=fsig.rsf > fnoi2.rsf sig2=fsig2.rsf niter=100 verb=y eps=0.0f rect#=(1,1,...)

Parameters
		float eps=0.0f regularization   int niter=100 number of iterations   int rect#=(1,1,...) smoothing radius on #-th axis   file sig= auxiliary input file name   file sig2= auxiliary output file name   bool verb=y [y/n] verbosity