Botec code modified by ZJUNlict

tested in Ubuntu 20.04
install
- install CoppeliaSim_Edu(latest : 4.2.0)
- clone whole project into catkin_ws/src
- download vrep ttt model files into Botec_Roban_Sim/vrep/* or any directory if you like
Ubuntu 18.04
- catkin_make find_package error
  - sudo apt-get install ros-melodic-joy*
  - sudo apt-get install ros-melodic-camera-info-manager
- python3
  - pip3 install rospkg
  - pip3 install netifaces
  - pip3 install defusedxml
run
- compile catkin_ws/src
- roscore
- coppeliaSim.sh ***.ttt
- rosrun ik_module ik_module_node
- roslaunch bodyhub bodyhub.launch sim:=true
- python3 Botec_Roban_Sim/player_scripts/demo.py

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