add license in file

Author: dacer

androidarcmenu/src/main/java/com/hackplan/androidarcmenu/AnimatorUtils.java

@@ -1,3 +1,19 @@
+
+/**
+ * Copyright (C) 2015 ogaclejapan
+ *
+ * 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.
+ */
 package com.hackplan.androidarcmenu;
 
 import android.animation.Animator;
@@ -15,8 +31,8 @@
 import java.util.List;
 
 /**
- * Created by ogaclejapan.
- * https://github.com/ogaclejapan/ArcLayout
+ * Modified by Dacer.
+ * from https://github.com/ogaclejapan/ArcLayout
  */
 
 class AnimatorUtils {