Synopsis
		sfpchain < inp.rsf pef=pef.rsf > out.rsf nc=1 verb=(bool) (1 == nt) niter=0 liter=50 rect=1

Parameters
		int liter=50 number of linear iterations   int nc=1 number of components   int niter=0 number of iterations   file pef= auxiliary output file name   int rect=1 smoothing in time   bool verb=(bool) (1 == nt) [y/n] verbosity flag