minor: credit Shadowcat Systems Ltd in .mailmap file

.mailmap

@@ -46,14 +46,14 @@ Othello Maurer <omaurer@venda.com>
 Pan Fan <nightsailer@gmail.com>
 Rahul Dhodapkar <rahul@mongodb.com> <rahul.m.dhodapkar@gmail.com>
 Rassi <rassi@mongodb.com> <rassi@10gen.com>
-Robert Sedlacek <phaylon@cpan.org> <rs@474.at>
+Robert Sedlacek (Shadowcat Systems Ltd) <phaylon@cpan.org> <rs@474.at>
 Robin Lee <cheeselee@fedoraproject.org>
 Roman Yerin <kid@cpan.org>
 Ronald J Kimball <rkimball@pangeamedia.com>
 Stephen Oberholtzer <stevie@qrpff.net>
 Steve Sanbeg <stevesanbeg@buzzfeed.com>
 Stuart Watt <stuart@morungos.com>
-Thomas Bloor <tbsliver@cpan.org> <tbsliver@shadow.cat>
+Thomas Bloor (Shadowcat Systems Ltd) <tbsliver@cpan.org> <tbsliver@shadow.cat>
 Uwe Voelker <uwe.voelker@xing.com>
 Whitney Jackson <whjackson@gmail.com>
 Zhihong Zhang <zzh_621@yahoo.com>