Added license section

README.md

@@ -38,3 +38,20 @@ AAR File coming to soon to maven central near you ;)
 
 Or use JitPack
 https://jitpack.io/#christophesmet/android_maskable_layout
+
+License
+=======
+
+    Copyright 2015 Christophe Smet.
+
+    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.