Trash Rally DS - Updated again

Demo and source updated

Changelog :
- Even more code cleaning
- "S_GAME" structure begins
- Prliminary scoring system
- Game Over screen and start over
- Barrels still broken :-/

Use previous links to download !

To-Do List update :
- All structures need to be a part of S_GAME
- Rename all specific to generic (RallyCar -> PalyerOne, etc....)