Fixes

• Fixed issue where you could join a vanilla server with mods loaded on your end, causing the server to crash.
• Improved scoring for Race mode.
• Fixed crash when swapping to Chasedown whilst in a level in multiplayer.
• Fixed crash when going to a non-existent room with the /room command in multiplayer.
• Laps now get reset properly for each new level in Race and Chasedown.
• Campaign levels are now properly compatible with Race mode. (They previously weren't, which lead to subsequent crashes when trying to clear a Campaign level under Race mode.)