Updated AUTHORS.txt.

Author: scottgonzalez

AUTHORS.txt

@@ -231,3 +231,8 @@ Pavel Selitskas <p.selitskas@gmail.com>
 Bjørn Johansen <bjorn.johansen@metronet.no>
 Matthieu Penant <thieum22@hotmail.com>
 Dominic Barnes <dominic@dbarnes.info>
+David Sullivan <david.sullivan@gmail.com>
+Thomas Jaggi <thomas.jaggi@gmail.com>
+Vahid Sohrabloo <vahid4134@gmail.com>
+Travis Carden <travis.carden@gmail.com>
+Bruno M. Custódio <bruno@brunomcustodio.com>