Update README.md

add License

Author: HarlonWang

README.md

@@ -79,3 +79,24 @@ Here they are
 [Email](mailto:[email protected])
 
 [Weibo](http://weibo.com/601265161)
+
+
+
+
+### License
+```
+Copyright 2015 jack wang
+
+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.
+```
+