Fixed finale rain.

- Fixed survivor dying after getting off escape train, if you've been on it before.
- The finale now lasts less time. And some props glow to indicate the way to go.

- Tanks and witches don't spawn anymore during crescendo event in 3rd map.

- Added more car color variation.
- Fixed nav in several areas.
- Added missing cars, prop and sprays present in L4D1 version.
- Adjusted distribution of items and weapons.
- Fixed intro dialogue.
- Fixed musicbox not triggering panic event.
- Fixed double ammunition.
- Added areaportals for optimization.
- Train on 3rd map now glows when it arrives to show survivors what to do.
- Updated addon thumbnail.
- TLS update two Tanks music theme is used on finale.

- Added Last Stand update skins variations for melees and weapons.
- Changed infected population to L4D1.
- Removed fallen tree trunk on second map to avoid frustrating instant kills.
- Removed barricade from graveyard because it didn't make much sense, but forced passage through bride witch.
- Removed random passage block from construction in 3rd map to make it clearer to survivors that there are two path options.
- Finale button glows from a greater distance, to make life easier for those who can't find it.

No more crashes when loading maps.