Add Xiuming Chen to contributors.

A. Jesse Jiryu Davis · A. Jesse Jiryu Davis · commit dc4b127cce4e · 2013-07-05T19:23:14.000-04:00
diff --git a/doc/contributors.rst b/doc/contributors.rst
@@ -63,3 +63,4 @@ The following is a list of people who have contributed to
 - Emily Stolfo (estolfo)
 - Sam Helman (shelman)
 - Justin Patrin (reversefold)
+- Xiuming Chen (cxmcc)
