Adds Mark Thurman to AUTHORS

AUTHORS

@@ -86,6 +86,7 @@ Marcin Lulek <info@webreactor.eu>
 Mark Hellewell <mark.hellewell@gmail.com>
 Mark Lavin <mlavin@caktusgroup.com>
 Mark Stover <stovenator@gmail.com>
+Mark Thurman <mthurman@gmail.com>
 Martin Galpin <m@66laps.com>
 Martin Melin <git@martinmelin.com>
 Matt Williamson <dawsdesign@gmail.com>