Synopsis
		sfnoise < in.rsf > out.rsf seed=time(NULL) type=y var= range= mean=0 rep=n

July 2011 program of the month:
http://ahay.org/blog/2011/07/03/program-of-the-month-sfnoise/

Parameters
		float mean=0 noise mean   float range= noise range (default=1)   bool rep=n [y/n] if y, replace data with noise   int seed=time(NULL)   bool type=y [y/n] noise distribution, y: normal, n: uniform   float var= noise variance

Used In
		BEI          ft1/autocor   CHEN          test/xtime   CUP          rna2d/shot rna2d/simple rna3d/shot rna3d/sin   CWP          geo2009TTIModeSeparation/fold pept2011MicroearthquakeMonitoring/saf1 pept2011MicroearthquakeMonitoring/saf3