update gitignore to include Thumbs.db files
update gitignore to include Thumbs.db files

MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab,MyRobotLab/myrobotlab