update iss4
update iss4
update iss4
update iss4
upate iss4
update iss4
iss4 finished.
solved iss3

solved iss1 to 60%
update master
Removed java.util.TimerTask and javafx.concurrent.Task

Added javafx.concurrent.Service

Fixeds in counter (CountDownService)
update Readme
upate Readme
update readme
update master
update master
update master
update branch