Updated Cubemaps and rebuilt stringtables

removed some trash files to reduce the overall download size

forgot the stupid stringtables on map 3. now corrected.

Corrected the bugged water at the falls
Added more trees and shrubs to falls area
Adjusted fogging to make falls area look nicer.
:)

Rebuilt the finale escape vehicle.. hopefully no more bugs!

Updated finale script. should have fixed the finale problem.

- added a new survival map Salvation Town Bridge
- Fixed funicular issue on the finale
- Added new steps to the finale map to make it more challenging
- updated the nav mesh in finale map to fix some problems

- updated nav in map 3

- quick fix for a new camera brush that was blocking the player path

- Updated intro so it's shorter
- Updated campagin poster so it has the correct set of survivors on it
- updated some long standing nav issues
- Added more spawn points to map 3