Add Lei Xu to AUTHORS and CONTRIBUTORS
diff --git a/AUTHORS b/AUTHORS
index b4cacc0..fcd2be9 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -19,3 +19,4 @@
 Paul Redmond <paul.redmond@gmail.com>
 Shuo Chen <chenshuo@chenshuo.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
+Lei Xu <eddyxu@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index c49fbdb..327d44c 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -35,3 +35,4 @@
 Pierre Phaneuf <pphaneuf@google.com>
 Shuo Chen <chenshuo@chenshuo.com>
 Yusuke Suzuki <utatane.tea@gmail.com>
+Lei Xu <eddyxu@gmail.com>