updating AUTHORS to include Steven Bambling

Signed-off-by: Nick Chappell <nick@intronic.org>

AUTHORS

@@ -4,3 +4,4 @@ Mélanie Gault <melanie.gault@ville-noumea.nc>
 Michael Friedrich <michael.friedrich@netways.de>
 Nick Chappell <nick@intronic.org>
 Thomas Weißschuh <thomas@t-8ch.de>
+Steven Bambling <smbambling@gmail.com>