Update v0.5.bf6f65b

This update includes a variety of AI fixes, a few physics fixes, and some new objects and object variants!

• AI now calculate the fuel they need to finish in a more "human-like" fashion.
  
• Adjusted tyre wear calculation to reduce AI advantage.
  
• Improved the low-speed turning behaviour of the Drift and Lightning.
  
• FIXED: AI no longer drive through the pits on the last lap unnecessarily.
  
• FIXED: Edges of bridge models now cause significantly less "bouncing".
  
• FIXED: AI should no longer have a disadvantage in certain grid slots (hopefully).
  

• Added new coloured variants of the various armco barriers.
  
• Added a new Chain Link Fence object.
  

• The main menu sometimes experiences distortions or other rendering issues - changing resolution, or restarting the game may rectify the issue.
  
• Occasionally, when in Windowed mode, changing the language multiple times in quick succession can shrink the game window.