update README.md

README.md

@@ -46,3 +46,19 @@ console.log(file.exists('/etc/passwd'));
 # License
 
 Released under the [Apache 2 License](http://www.apache.org/licenses/LICENSE-2.0).
+
+```
+Copyright 2015 Guoqiang Chen
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```