Program sfhorwrite | save rsf data into horizon ASCII format, eq to dd form=ascii 
[SYNOPSIS]
sfhorwrite < in.rsf head= tail= fromat=
[PARAMETERS]
string  | fromat | = |   | 	format 
string  | head | = |   | 	header 
string  | tail | = |   | 	tail 
[DIRECTORY]
user/chen
