Newtron a2a

Fixes:
- Fixed broken brushes across the map.
- Added a block bullet brush for missing hitbox on traincab model.

Adjustments:
- Changed the mid right bridges to limit sightlines.
- Changed water height on mid.
- Adjusted mid houses doorways to fix sightlines.
- Adjusted some lights.
- Adjusted ramp to mid to make it wider.
- Moved ammo boxes in mid.

Added:
- Added soundscapes to make it feel a little more alive.
- Added additional barrels on traincab to limit sightline from mid to batts.

- Redesigned mid to be more interesting. More open compared to last time based on "maze" criticism
- Risen the mid cap point to make it level to the rest of the map.
- Added water to the lower section of cap area for potential theming and pyrosharks
- Moved spawns closer to the building
- Got rid of the gate dropdown for
- Redesigned flanks to not be as tall or overpowered for snipers, making it level to the higher ground.
-Added props to break up the empty space and give some sort of theming, no real theme atm.