Lanes for the track

[Stefanos Papadopoulos]

Add lanes for the analogue tiles.

[SVN]

New commit by spapadopoulos (revision [211]):
[fix for ticket #68] additional lanes for the analogue track
i made a couple of changes in the TrackWidget? so you can see all 4 lanes in the analogue track

[SVN]

New commit by hheimbuerger (revision [246]):
[Partial fix for ticket #68] Tilesets are now customizable and various error checks have been added.

The tilesets are no longer based off a fixed set of enums, but defined by what's given in the tiles.xml. The whole code around reading them at startup has been restructured.

The tilesets must now state how many lanes each of their tiles will contain and this is enforced, i.e. having just one tile with less or more lanes will raise an exception.

Various checks have been added, e.g. that tracks contain exactly one initial tile.

The bean for the tileset repository is now named tilesetRepositoryBean to follow the convention.

The change to the tiles.xml in [211] has been reverted, I still don't know what it was for.

Two track files with proper names for the digital and the analogue sets have been added.

[SVN]

New commit by hheimbuerger (revision [247]):
[Partial fix for ticket #68] Implemented drawing an arbitrary number of lanes over the track.

'arbitrary' means <=4 in this case, but that's simply because there aren't more colors defined.