List the content of a cgns file
usage : cgnslist [options] CGNSfile [node] options:
-b
= brief - file summary only -i<cnt> = set indent level (default 2)
-f
= follow links
-l
= print node label
-t
= print node data type
-d
= print node dimensions
-s
= print node size in bytes
-a
= print all -ltds