Added me to authors and contributors.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/181153

AUTHORS

diff --git a/AUTHORS b/AUTHORS
index f295fba..6a2efe1 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -30,6 +30,7 @@
 Hector Chu <hectorchu@gmail.com>
 Isaac Wagner <ibw@isaacwagner.me>
 James Meneghello <rawrz0r@gmail.com>
+Jan H. Hosang <jan.hosang@gmail.com>
 Jan Mercl <befelemepeseveze@gmail.com>
 Jonathan Wills <runningwild@gmail.com>
 Josh Goebel <dreamer3@gmail.com>