Corner A4

- Opened the areas next to mid
- Added cover to replace the wall
- Moved the healthpack
- Added an out-of-bounds area
- Increased the height of the fences to cut off sightlines

- Fixed a floating crate

- Closed the exterior route from mid to last and added another exit for it
- Opened the interior route from spawn/last to mid
- Added a route and balcony from spawn to last
- Added more signs
- Fixed some clipping issues
- Slightly increased the size of mid
- Fixed goal string

I don't have any good ideas on how to rework mid for now, but I'll keep thinking about it

- Fixed respawn wave times
- Made the fence slightly smaller at spawn

- Opened the lasts and added a death pit
- Removed the flank connection between the two routes to a last
- Increased the height of the skybox
- Added more health to mid
- Changed the gamemode to a KotH/3CP hybrid
- Redid spawn and added another route to (hopefully) make spawncamping harder
- Added some signs

Things on the hitlist:
- Rework the routes to last for the defenders
- Potentially increase the size of mid