[Iwor-developers] The aging function is done

[liang y. <iam...@gm...>]

Hello  all:
    I add a property "commands" which can be init by config file  to
robot.When it finishes  a "MOVE","PICK" or "DROP" command,the "commands"
will be  reduced one.If the "commands" drop to zero

,the robot will be removed.