Fixed bug where ammo and laser sights wouldn't spawn in return visits to Center.

Fixed bug where L4D1 survivors would crash the game due to not being preached (how was this working for me before this?!).

Also, why did this still upload even after I canceled the upload?!

Replaced Center Start level with new Prolog level.
Fixed bug where weapons would not spawn when returning to Center.

Ending stats are "less broken".
Fixed bug where level could transition with a Survivor outside of the Saferoom leaving them stuck outside of the level.
Added trees, rocks, and a crashed boat in North for zombies to spawn behind.
Added 'Block LOS' in Southwest for zombies to spawn behind.
Changed Saferoom wall textures from MrFunreal's dev textures to stock dev textures.

Fixed bug where going back to the center map causes the poster to be shown again.
Fixed weapon with TLS skins to now show thoes skins.
Added walls in Center for zombies to spawn behind.
Added containers in Northwest for zombies to spawn behind.
Added large rocks in East for zombies to spawn behind.
Added plea to save video games in East.
Added a "Finale".