Handover A3

This update brings significant changes to how the high ground is accessed for both teams, hopefully giving attackers an easier time using their roof.

• High ground has been lowered by about 48hu to make spotting and fighting attackers from above slightly easier.
• The pile of crates allowing any class to access the high ground has been lowered significantly; only jumpers and classes who have opted to use mobility enhancing loadouts will be able to reach the roofs from the point.
• The entire stairway room has been redone, with access to the room pushed back to become a second option when going the left route. This requires the defending team to push even further in if they want to get onto the attacker's roof.
• New indoor lighting and texture work on the highground building and the Hill, with specific RED and BLU theming.
• A few minor adjustments allow easier movement up improvised prop ramps.
  
• c u b e m a p s

Minor changes since the recent test gained a whopping two feedback nodes. Weeeee.

• The shutter doors outside of spawn on each side have been set up to open automatically once the round starts. They will stay open.
• Railings will now properly allow bullets and projectiles to pass.

Mostly minor tweaks, with one major adjustment. A1 was received positively so little had to be changed.

• Added clipping in a few places such as windows and props where it was needed.
• The building covering the train on each side has been raised higher with a slight increase in detail to emphasize it's new clipping. As such, this roof is no longer accessible.
  
• Detailing and contrasting textures added to help show that the shutter door outside spawn is not a detail.
• The playable area outside spawn has been shrunk as there wasn't much reason for it to be accessible.
• The support poles holding up the platform extensions on the Control Point were adjusted so they didn't interrupt movement.
  
• Added two team spectator cams.

Quick change to ensure the more reflective textures don't dust people's retinas.