Made AUTHORS and CONTRIBUTES alphabetical

AUTHORS

diff --git a/AUTHORS b/AUTHORS
index fcd2be9..a4c8bb5 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -15,8 +15,8 @@
 Eugene Zhuk <eugene.zhuk@gmail.com>
 Felix Homann <linuxaudio@showlabor.de>
 Google Inc.
+Lei Xu <eddyxu@gmail.com>
 Oleksandr Sochka <sasha.sochka@gmail.com>
 Paul Redmond <paul.redmond@gmail.com>
 Shuo Chen <chenshuo@chenshuo.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
-Lei Xu <eddyxu@gmail.com>

CONTRIBUTORS

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 327d44c..5695929 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -29,10 +29,10 @@
 Dominic Hamon <dma@stripysock.com>
 Eugene Zhuk <eugene.zhuk@gmail.com>
 Felix Homann <linuxaudio@showlabor.de>
+Lei Xu <eddyxu@gmail.com>
 Oleksandr Sochka <sasha.sochka@gmail.com>
 Pascal Leroy <phl@google.com>
 Paul Redmond <paul.redmond@gmail.com>
 Pierre Phaneuf <pphaneuf@google.com>
 Shuo Chen <chenshuo@chenshuo.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
-Lei Xu <eddyxu@gmail.com>