Autodromo International Siracusa 1.21

changelog:
- fix possible issue with grass
- removed seasons (caused grass issue?)
- added a camera by @DaBaeda
- added rainfx streams by @KevinK2

changelog v1.20
- enhanced lighting by @CrisT86
- road mesh raised to prevent cut-off wheels
- skids shaders fixed
- added crowd_facing spectators
- fixed things as ksFlag not being flags
- removed 4x3 loading screen & other errata
note: if the track crashes on loading, simply delete ./data/crowd_facing.ini

changelog:
- AI pit bug fix
- shader updates
- double sided fixes
- extra flag shaders on misc materials removed
- background/loading screens added
- UI version fix/update

credits:
- bug fix report from @crepelle