Update copyright/authors headers
diff --git a/input.c b/input.c
index b977250..9bcc10a 100644
--- a/input.c
+++ b/input.c
@@ -5,7 +5,7 @@
  *
  * Author: Robert Swiecki <swiecki@google.com>
  *
- * Copyright 2010-2015 by Google Inc. All Rights Reserved.
+ * Copyright 2010-2018 by Google Inc. All Rights Reserved.
  *
  * 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