Info(3pm): Extend documentation

=head1 NAME

Travel::Status::DE::EFA::Info - Information about a station

Travel::Status::DE::EFA::Info - Information about a public transit stop

=head1 SYNOPSIS

    if ( $info->subject and $info->subtitle ne $info->subject ) {

        printf( "# %s\n%s\n", $info->subtitle, $info->subject );

    }

    else {

        printf( "# %s\n", $info->subtitle );

    }

=head1 VERSION

version 3.01

=head1 DESCRIPTION

Travel::Status::DE::EFA::Info describes a tram/bus/train line departing at the

stop requested by Travel::Status::DE::EFA. Note that it only covers one

direction, so in most cases, you get two Travel::Status::DE::EFA::Info objects

per actual line.

Travel::Status::DE::EFA::Info holds a single information message related to

a specific public transit stop.

=head1 ACCESSORS

All accessors may return undef.

Individual accessors may return identical strings.

Strings may contain HTML elements.

=over

=item $info->additional_text

=item $info->content

=item $info->link_url

=head1 METHODS

URL to a site related to this information message.

The site may or may not hold additional data.

=head2 ACCESSORS

=item $info->link_text

Text for linking to link_url.

=item $info->param

Hashref of parameters, e.g. C<< incidentDateTime >> (string describing the

date/time range during which this message is valid).

=item $info->subject

=item $info->subtitle

=back

=head1 DIAGNOSTICS

=back

=head1 BUGS AND LIMITATIONS

The B<route> accessor returns a simple string, an array might be better suited.

=head1 SEE ALSO

Travel::Status::DE::EFA(3pm).