Update v0.4.f090d72

This update includes some performance improvements, as well as a few minor features and fixes. At the moment the team’s focus is on the upcoming online multiplayer update, so this update is a little smaller than usual.

• Improved performance related to skidmarks and terrain shading in race mode.
  
• Adjusted wheel damage to be a bit less vicious.
  
• FIXED: Tree stumps now behave correctly when colliding.
  
• FIXED: Corrected several objects UV mappings.
  

• Added Polish language localisation (thanks to Salami/Scorpion).
  

• Added new size variants for trees and bushes.
  
• FIXED: UI models for the second house type are now displayed properly in the UI.
  

• 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.