First workable version.
I improve the functionality on controlling the robot:

1. wrap the the control function in function RobotMove, which takes speed and direction as parameter;
2. add slider control and edit control for setting/viewing the speed and direction;
3. remove the old interface for controling the robot.
I add the functionality of adjusting camera orientations.
Merge branch 'master' of github.com:zhangtemplar/FollowME