Synopsis
		sfswnorm < in.rsf > out.rsf size=0 sw=n log=n var_thres=0. perc=5

Parameters
		bool log=n [y/n] log scaling   float perc=5 threshold percentage of the maximum value   int size=0 sliding window radius   bool sw=n [y/n] sliding window   float var_thres=0. variance threshold (normalized)