Add scenarios

Details

We are at the point of the project, in which we really need traffic jam situations. This scenario needs to be added as well.

Further, we need a scenario of just cars passing by and beacons, so that we can show our message-sharing functionality.

While we are at it, information beacons have to get some sort of representation on the map. It should be fully sufficient to give them just a grey circle.

In the case of information sharing demo, these circles need to change color when they are transmitting messages. Cars should change colors when receiving messages as well. As this is no required for the traffic jam scenario (or would be confusing in case multiple messages are being transmitted) separate vehicle classes just for that should be added.