Update README and convert to Markdown

Author: petdance

README

@@ -1,21 +1,16 @@
-README for HTML::Tagset
-
-                          HTML::Tagset
+# HTML::Tagset
 
 This module contains data tables useful in dealing with HTML.
 
 It provides no functions or methods.
 
-
-
-PREREQUISITES
+## PREREQUISITES
 
 This suite requires Perl 5.
 
 HTML::Tagset doesn't use any nonstandard modules.
 
-
-INSTALLATION
+## INSTALLATION
 
 You install HTML::Tagset, as you would install any perl module
 library, by running these commands:
@@ -31,36 +26,21 @@ something like this command:
 
   perl Makefile.PL LIB=~/perl
 
-
-DOCUMENTATION
+## DOCUMENTATION
 
 POD-format documentation is included in Tagset.pm.  POD is readable
-with the 'perldoc' utility.  See ChangeLog for recent changes.
-
-
-MACPERL INSTALLATION NOTES
-
-Don't bother with the makefiles.  Just make a HTML directory in your
-MacPerl site_lib or lib directory, and move Tagset.pm into there.
-
-
-SUPPORT
-
-Questions, bug reports, and suggestions for HTML::Tagset should just
-be sent to me at sburke@cpan.org
-
+with the `perldoc` utility.  See ChangeLog for recent changes.
 
-AVAILABILITY
+## AVAILABILITY
 
-The latest version of HTML::Tagset is available from the
-Comprehensive Perl Archive Network (CPAN).  Visit
-<http://www.perl.com/CPAN/> to find a CPAN site near you.
+The latest version of HTML::Tagset is available from the CPAN.
+See https://metacpan.org/pod/HTML::Tagset
 
 
-COPYRIGHT
+## COPYRIGHT
 
 Copyright 1999,2000 Sean M. Burke <sburke@cpan.org>; Copyright
-1995-2000 Gisle Aas; all rights reserved.
+1995-2000 Gisle Aas. Copyright 2000-2019 Andy Lester.
 
 This library is free software; you can redistribute it and/or
 modify it under the same terms as Perl itself.