doc: update AUTHORS list

Update AUTHORS file using tools/update-authors.sh

PR-URL: #1018
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>

Author: rvagg

AUTHORS

@@ -715,5 +715,13 @@ Charmander <~@charmander.me>
 Jimmy Hsu <jimmyhsu@users.noreply.github.com>
 jigsaw <jigsaw@live.jp>
 Emily Rose <nexxy@symphonysubconscious.com>
+Shinnosuke Watanabe <snnskwtnb@gmail.com>
+Bruno Jouhier <bjouhier@gmail.com>
+René Kooi <rene@kooi.me>
+Petka Antonov <petka_antonov@hotmail.com>
+Ryan Scheel <Ryan.havvy@gmail.com>
+Benjamin Gruenbaum <inglor@gmail.com>
+Pavel Medvedev <pmedvedev@gmail.com>
+Russell Dempsey <sgtpooki@gmail.com>
 
 # Generated by tools/update-authors.sh