Update AUTHORS and CONTRIBUTORS appropriately

- Add ccross to CONTRIBUTORS
- Add kou to AUTHORS
diff --git a/AUTHORS b/AUTHORS
index 8ee1e1a..787d767 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -8,4 +8,5 @@
 #
 # Please keep the list sorted.
 
+Kouhei Sutou <kou@cozmixng.org>
 Google Inc.