Draw car changes

Necessary changes to the Car and Street class, and also implementation
of the GUI class
Fix merge problems

Maybe we screwed the car class
Merge remote-tracking branch 'origin/Groversi'
Changed streetindex atribute of Car

Changed it from int to int[2]
Draw function

Implement the Draw function on the GUI class
fixed addCar(Crossing c) in Grid.cs
Add conditions for the second crossing

Add conditions to make possible to draw cars on the second grid
Merge branch 'master' of https://github.com/fontys/Pro-CSharp
too many changes to specify
removed action in simulation controller