Holdout (A/D) b2b

Version b2b:

Minor

• Updated some geometry to better telegraph if it is accessible or not.
• Updated Red spawns to only use the A or B side depending on which one is left.
• Updated spawn times so it isn't as harsh on Red as Blu progresses
• Added ammo to point C

Courtesy as always of Fishbus.

Version b2:

Major

• Reworked Blu spawn to be closer to the base
• Added courtyard for Blu to roam around and build in at the start/setup of the game.
• 3d skybox finished to a greater degree.
• reworked vent system at B, while adding to and changing the routes made by them.

Minor
- Updated spawn times to be more in favour of blu, and less in favour of red as points are capped.
(Red changed from +1 per cp lose, to +2 per cp lost)
- Reworked cover around B

Courtesy of Fishbus, as always.