STORMARNRING 0.35

- general overhaul of materials/textures
- fixed geometry for kstree-shader
- added grassfx compatibility
- fixed camera-transition error on the main straight

- corrected the drs detection-zone values

- rework of textures/materials (still wip)
- added experimental dirt layer to asphalt-surfaces
- added drs zones and signs
- minor fixes and detailing

- added track cameras
- improved ai spline for less cpu-consumption

- minor general overhaul and rework of textures to improve performance

- added billboards (still needs fine tuning)
- reworked track borders
- detailing of spectator-stands and pit-building
- fixing of smaller bugs and imperfetions
- differentiation between valid and not-valid surfaces

- renamed the track folder to match the trackname
- split in 4 models for better handling during import/export
- added spectator-stands
- optimized the surface in some bumpy/rough parts/corners
- optimized the geometry of the catchfences (not finished yet)
- redistributed the trees
- added some detailing to the lower part of the bridge
- some modifications of the outer terrain
- started reworking the tracklines