sensor/ray/range: edited min + max with adapter demo

+javadoc
+search for xml tags
+XPath example
+new jaxen.jar library

-Removed .sdf
-New featuremodel.xml
-Added turtlebot repository from
https://github.com/ROBOTIS-GIT/turtlebot3
with relevant turtlebot3_burger.gazebo.xacro file