Make race starting points definable

[Henrik Heimbuerger]

Currently, all cars start on track section 0, step 0, placed on separate lanes.

The starting positions of all cars should be defined on the finishing straight tile (or in the track?) and the TilesetRepository has to parse that data. Then, CarPosition.reset() can be updated to use that information.

[SVN]

New commit by hheimbuerger (revision [385]):
[Partial fix for ticket #122] Added support for definable starting points.

So far, the starting points can only be defined on the initial tile, using <startingPoint> and specifying a lane index and a step count.

[Henrik Heimbuerger]

To do: collect the starting points from *all* tiles in Track.getStartingPoints() and use them in the right order.

[SVN]

New commit by spapadopoulos (revision [387]):
[Fix for ticket #122] added the starting points for the digital and analogue tiles

[SVN]

New commit by froth (revision [388]):
[Related to ticket #122] Added validation count players against starting points on track

[SVN]

New commit by spapadopoulos (revision [400]):
[Fix for ticket #122 #133] changed the starting points for the digital tile. i calculated the coordinates for the visualization for the checkpoints.

not referenced to a ticket: i deleted needless tile pictures. i customized the analogue track. i deleted the needless digital track.

[SVN]

New commit by hheimbuerger (revision [496]):
[Partial fix for ticket #122] A track can now contain multiple tiles with starting points.

All starting points will be combined by Track.getStartingPoints(). The initial tile will have the last starting points. (It would be more natural to have the additional starting points behind the finishing straight, but that would raise a lot of problems with counting laps, as right now laps are counted right behind the finishing straight.)

So far, only the debug tileset contains a tile with additional starting points.