adde speed calculation to cars
adde speed calculation to cars

hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701,hkurhinen/hwo2014-team-701