Fixes to GoToObjectPFN and small changes to Game2.
- GoToObjectPFN never used isFinished() and therefore never checked for the stopping distance input, now it does.
- GoToObjectPFN never used slowDownCloseToTarget correctly. If the value was true, it went slowly, if false, it went quickly. Now it goes slowly iff it's set to true and we are actually close to the target.
- TODO: implement a check for where to shoot, e.g. we should find the open space in the goal when looking for a shot.