Create standard visualisations

[markvankoningsveld]

A simple feature almost everybody would like to have is to visualize the time and position information from the logs against a map background. Ideally we want the timeslider to be scrollable (quick scrolling forward and backward) and expandable (a wider timewindow should show multiple agent positions, so each trajectory gets a trace). This functionality links with the task to 'Establish steady links with OpenTNSim'. The scrolling in time becomes more useful when sailing along a route is possible.