Add licenses and remove third party libraries

src/java/tests/com/facebook/csslayout/LayoutCachingTest.java

@@ -1,3 +1,11 @@
+/**
+ * Copyright (c) 2014, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
 package com.facebook.csslayout;
 
 import org.junit.Test;