Merge remote-tracking branch 'origin/master'

README.md

@@ -308,4 +308,22 @@ parameter.setDebug(true);
 <img src="img/im9.jpg" width="360">
 
 
+# License
+```
+Copyright 2019 屈健涛
+
+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.
+```
+
+