Synopsis
		sfmf < in.rsf > out.rsf nfw= boundary=n

January 2015 program of the month:
http://ahay.org/blog/2015/01/30/program-of-the-month-sfmf/

Parameters
		bool boundary=n [y/n] if y, boundary is data, whereas zero   int nfw= filter-window length (positive and odd integer)