PSBBOX - change BoundingBOX of existing PostScript file	

 psbbox < PostScriptfile [optional parameters] > PostScriptfile

 Optional Parameters:						
 llx=		new llx						
 lly=		new lly						
 urx=		new urx						
 ury=		new ury						
 verbose=1	=1 for info printed on stderr (0 for no info)