Reformatted Data-Dumper Changes as per CPAN::Changes::Spec

This means that tools can parse this, and in particular MetaCPAN
will list the changes when you look at the dist/release page for
Data-Dumper.

dist/Data-Dumpers/Changes used to be in pod, with a known pod
issue, so that's now dropped.

Updated AUTHORS and checkAUTHORS, as my github account has
an email address not currently known, but it's my prime
email address for Perl stuff.

AUTHORS

@@ -938,7 +938,7 @@ Nathan Kurz                    <nate@valleytel.net>
 Nathan Torkington              <gnat@frii.com>
 Nathan Trapuzzano              <nbtrap@nbtrap.com>
 Neale Ferguson                 <neale@VMA.TABNSW.COM.AU>
-Neil Bowers                    <neil@bowers.com>
+Neil Bowers                    <neilb@neilb.org>
 Neil Watkiss                   <neil.watkiss@sophos.com>
 Neil Williams                  <codehelp@debian.org>
 Nicholas Clark                 <nick@ccl4.org>

Porting/checkAUTHORS.pl

@@ -1043,7 +1043,8 @@ sub _raw_address {
 
 neale\100VMA.TABNSW.COM.AU              neale\100pucc.princeton.edu
 neeracher\100mac.com                    neeri\100iis.ee.ethz.ch
-neil\100bowers.com                      neilb\100cre.canon.co.uk
+neilb\100neilb.org                      neilb\100cre.canon.co.uk
++                                       neil\100bowers.com
 
 nospam-abuse\100bloodgate.com           tels\100bloodgate.com
 +                                       perl_dummy\100bloodgate.com