Synopsis
		sfstolt < in.rsf > out.rsf vel= pad=nt extend=4 mute=12 minstr=0.0 stretch=1

Requires the input to be cosine-transformed over the lateral axes.

August 2014 program of the month:
http://ahay.org/blog/2014/08/03/program-of-the-month-sfstolt/

Parameters
		int extend=4 trace extension   float minstr=0.0 minimum stretch allowed   int mute=12 mute zone   int pad=nt padding on the time axis   float stretch=1 Stolt stretch parameter   float vel= Constant velocity (use negative velocity for modeling)