Update README.md

Author: githubwing

README.md

@@ -166,3 +166,20 @@ denpendcy为HeaderView。并且监听RecyclerView的滑动。
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+
+
+# License
+
+    Copyright 2016 androidwing1992
+
+    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.