add LICENSE

LICENSE

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+BSD 3-Clause License
+
+Copyright (c) 2021, Franz Pucher
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

open-source-license-acknowledgements-and-third-party-copyrights.md

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+# Open Source License Acknowledgements and Third-Party Copyrights
+
+diffbot is licensed under the terms of the [BSD 3-Clause License](./LICENSE).
+
+diffbot utilizes third party software from various sources. Portions of this software are copyrighted by their respective owners as indicated in the copyright notices below.
+
+The following acknowledgements pertain to this software license.
+
+### MIR ROBOT
+License: BSD-3-Clause
+https://github.com/dfki-ric/mir_robot/blob/melodic/LICENSE
+
+
+### TURTLEBOT3
+License: Apache License 2.0  
+https://github.com/ROBOTIS-GIT/turtlebot3/blob/master/LICENSE
+
+
+### ROS CONTROL
+License: BSD-3-Clause
+https://github.com/ros-controls/ros_control/blob/noetic-devel/LICENSE
+
+
+### Linorobot
+License: BSD-2-Clause
+https://github.com/linorobot/linorobot/blob/master/LICENSE
+
+### HUSKY
+License: 
+https://github.com/husky/husky
+
+### MOBILE ROBOT DESCRIPTION
+License: BSD-3-Clause
+https://github.com/pxalcantara/mobile_robot_description/blob/master/LICENSE
+
+### eborghi10/my_ROS_mobile_robot
+License: 
+https://github.com/eborghi10/my_ROS_mobile_robot