add new commands for drive/navi node check
change the gotoxy parameters: now you haven't points anymore. Instead of this points, now it's possible to set barriers (normal/force mode)
ATTENTION: no test until now -> you are alone with your problems ;-)
removed the txlaser-command, because we haven't any laser system on our robo
BUG solved: task-handlers are pointers... now it's possible to set a task to suspend.
now we have 7 different task priorities in our system