Display time the car sent outside the track.

Removed all drawing related things from Model because that class is
independent of drawing and is used even in non-drawing mode. Drawing
related parameters may be used when setting the color for example, which
should be done outside of Model which has only common parameters.
Show area inside track
Improve checking of car outside the track in real time mode
Indicate car out time with colors
Use different color for active car
Make car out timeout configurable
Added trace
Use parameter to set what interval trace is printed
Merge pull request #58 from petersohn/master

Display how much time the car spent intersecting the track edge