Update copyright info and date. (ros-infrastructure#479)

nuclearsandwich · web-flow · commit 837582a6e80d · 2018-07-03T12:43:03.000-07:00
diff --git a/LICENSE.txt b/LICENSE.txt
@@ -1,6 +1,7 @@
 Software License Agreement (BSD License)
 
 Copyright (c) 2013, Willow Garage, Inc.
+Copyright (c) 2013-2018, Open Source Robotics Foundation, Inc.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
