Update Early Access 0.8

here's the changelog :

0.8

• Lotus Exige 240
• Ferrari 312T F1
• Revised AI behavior
• Collisions performance improvements
• New sky box with clouds
• Fixed gui issue with spinner
• Improved x360 controller support at low speed
• Fixed gearshift sound on BMW M3 e92 Drift
• Improved rearview mirrors & added more rendering options in the launcher
• Default launcher theme: opponent skins are randomized from all available skins
• Default launcher theme: opponent setups are now set on a per-track basis
• Launcher: control configuration's Xbox360 section revised
• Fixed end race chart display bug