=head2 B<usage()>

Gives the usage of the tool, the compulsory and optional parameters, 
the author(s), revision numbers and the last revised time
Prints the return code the tool should exit with

=cut

=head2 B<usage()>

Gives the usage of the tool, the compulsory and optional parameters, 
the author(s), revision numbers and the last revised time
Prints the return code the tool should exit with
  
=cut