arena_testinggrounds a3

A3 update. I changed some stuff. I made changes but it's all pointless cause no one will even play this map.

I forgot cubemaps.
And pickups
So here they are
That's it i think.
Also you could float when hugging the windows i hope it's fixed.

Made actual spawns
Forgot about pickups but who cares anways it's arena nobody plays arena.
I wanted the map to have some cool mechanics but meh. I can't be bothered to fix the problems that came with it.