New features:

• Fix GitHub Issue #49: Change custom track directory
  • On Linux/Unix also $XDG_DATA_HOME/DustRacing2D/tracks is added to search paths, or $HOME/.local/share/DustRacing2D/tracks if $XDG_DATA_HOME is not defined.
• Fix GitHub Issue #53: Add a small delay before reverse engages

Bug fixes:

• Fix GitHub Issue #8: Confusing/weird stars
• Fix GitHub Issue #5: Pit stop spam
  • Collision detection partly rewritten as a side effect
• Fix GitHub Issue #48: Walls and grandstands are pushable

Other:

• Refactor sparkle effect due to changed collision event behavior
• Use SimpleLogger instead of MCLogger
  • Add --debug and --trace CLI options
  • Throw on unknown arguments