Bikernieki Race Track 0.6

This was supposed to be a bugfix (v0.55) release, but I managed to squeeze some new features aswell, so 0.6 it is.

changes:
- AI pit stop fix for 'Oval' and 'Skill' layouts
- AI wall crash fix for 'Oval' layout
- Hotlap spawn point fix for 'Oval' and 'Skill' layouts
- As per request I included brake and apex cones in 'Open Cruise layout' (with a possibility to load them via .ini file in any other layout)
- name inscriptions in race track of those 4 who donated me some money, go discover the location!
- 3D grass! various level of detail for grass models
- more accurate specular maps for asphalt materials
- added new sponsor banners
- trees, foliage and grass is "greener"
- removed unnecessary skidmarks
- some minor tweaks for UV texture coordinates

here, some narrow angle screenshots featuring Formula Easter from zizhgames.ru (jurik1984):

4 new layouts:
- Ring of Skill (Meistarības aplis)
- Big Ring (Lielais apvienotais aplis)
- VDC (Virtual Drift Championship) by Jonathan Simpson
- Open track / cruise configuration

- improved road surface collision model
- nicer materials
- some new textures
- removed apex and brake cones (as a request )
- collision wall fixes
- track section names for new layouts
- replay cameras for new layouts

- short "Oval" circuit configuration
- "sandbox" Drift configuration
- improved road surface collision model
- added dynamic grooves
- improved AI line (by Jānis Dancis)
- AI hints
- new camera sets (by norbs)
- added apex and brake cones
- some optimization
- detailed finish line and working semaphores
- collision wall fixes
- timing checkpoints now back to 3 (as supported by AC)
- track section names
- some new textures
- added flags and banners