Klondike a3

Changes from a2:

• Made the team areas not at mid a lot smaller
• Made some paths closer to mid
• Added spectator cameras
• Decreased respawn wave time by two seconds

Pretty small update

Finally fixed lighting on corrugated metal
Fixed train sounds only playing after 10 seconds
Minor optimization
Added trigger_push underneath train to push away any debris or gold bars that get trapped underneath them
Placed trigger_hurts in the train tunnel walls in case the train pushes you into them
Removed trigger_hurts from the train, so now it just pushes you
Changed skybox, environment lighting, and fog to better suit the theme
Placed func_nobuild around trees
Scaled mid down by 128...

Forgot to copy over some lights whoops

Mostly just visual and sound changes
Full changelog:

• "Sixty seconds" voiceline now plays at 60 seconds, not 75
• Fixed lighting on corrugated metal at mid
• Changed skybox, light_environment, and fog
• Added smooth lighting groups to tunnels and sewers
• Added hard lighting groups to a number of ramps
• Fixed Z-fighting at red spawn
• Slightly changed lighting in spawns
• Fixed a displacement at mid
• Added some lighting underneath balconies
• Changed positioning of lights...