Program sfshuffle | shuffle the data
[SYNOPSIS]
sfshuffle < pi.rsf > po.rsf axis=2 seed=n2 inv=n
[PARAMETERS]
int     | axis | =2 |   | 	
bool    | inv | =n |  [y/n] | 	
int     | seed | =n2 |   | 	
[DIRECTORY]
user/chen
