**** Release 0.017 *****
Wednesday 3 March 1999 - Ave Wrigley <wrigley@cre.canon.co.uk>
* uses HTML::TreeBuilder instead of the (depricated) HTML::Parse
* uses HTML::LinkExtor to extract links
* minor documentation bugs
* IGNORE_UNKNOWN option allows the robot to ignore unknown HTML tags
* ACCEPT_LANGUAGE option allows the user to specify languages accepted by the
USER_AGENT
* robot does a head request to check the MIME type of potential links, rather
than relying on filename extension