Synopsis
		sfiwarp < in.rsf > out.rsf warp=warp.rsf inv=y n1=nt eps=0.01 d1=1 o1=0

September 2012 program of the month:
http://ahay.org/blog/2012/09/03/program-of-the-month-sfiwarp/

Parameters
		float d1=1 output sampling - for inv=y   float eps=0.01 stretch regularization   bool inv=y [y/n] inversion flag   int n1=nt output samples - for inv=y   float o1=0 output origin - for inv=y   file warp= auxiliary input file name