Gray Co. rc1

patch notes:

- fixed an exploit that allowed for teleporter traps under the wooden scaffolding on RED side.
- Remade the (previously) tunnel path from spawn
- added some clipping on the woodwork for easier movement.
- Removed 1 wooden board on the main path to mid for easier movement
- Redone skybox
- more trees
- a few more details

Made some small improvements

- Now with HDR
- Changed some light_env settings, so it feels more moody
- Added some more foliage
- Added an extra arrow sign to the garage door
- Added light_glow sprites to the lightbulbs

If anyone has feedback on the detailing, please let me know.