pl_rushhour A18

this is BSP version of A3 update

- Added the most polluting train in front first BLU spawn.
- Made some fence higher between home and A point than before to prevent camper.

this is a bsp version of A2 update

vmf version of A2 update
- Fixed spawn door with area portal make the player can't pass through spawn door.
- Make BLU forward spawn brighter to make navigation easier.