Update Readme file with UR20 license comment

README.md

@@ -5,6 +5,8 @@
 
 [![License - apache 2.0](https://img.shields.io/:license-Apache%202.0-yellowgreen.svg)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
+
+The [UR20 meshes](ur_description/meshes/ur20) constitutes “Graphical Documentation” the use of which is subject to and governed by our “Terms and Conditions for use of Graphical Documentation”
 [![License](https://img.shields.io/badge/License-Universal%20Robots%20A/S%E2%80%99%20Terms%20and%20Conditions%20for%20Use%20of%20Graphical%20Documentation-blue.svg)](https://www.universal-robots.com/legal/terms-and-conditions/terms_and_conditions_for_use_of_graphical_documentation.txt)
 
 [![support level: community](https://img.shields.io/badge/support%20level-community-lightgray.png)](http://rosindustrial.org/news/2016/10/7/better-supporting-a-growing-ros-industrial-software-platform)

ur_description/package.xml

@@ -16,7 +16,8 @@
   <maintainer email="[email protected]">Nadia Hammoudeh Garcia</maintainer>
 
   <license>BSD</license>
-  <!-- The UR20 meshes are under a separate, non-oss license. Please check the license file before using the UR20 meshes -->
+
+  <!-- The UR20 meshes constitutes “Graphical Documentation” the use of which is subject to and governed by our “Terms and Conditions for use of Graphical Documentation”, which can be found here: https://www.universal-robots.com/legal/terms-and-conditions/terms_and_conditions_for_use_of_graphical_documentation.txt -->
   <license file="meshes/ur20/LICENSE.txt">Universal Robots A/S' Terms and Conditions for Use of Graphical Documentation</license>
   <!--<license file="meshes/ur20/LICENSE.txt" source-files="meshes/ur20/*" type="freeform">Universal Robots A/S' Terms and Conditions for Use of Graphical Documentation</license>-->