- added a bunch of overlays and office related models

- Fixed antline texture proxies (thanks November!)
- Added 1940 lobby wood/wallpaper textures
- Added static filing cabinet model (dynamic one coming soon)

- Added two new lamp models, lobby_lamp and office_lamp
- Hopefully fixed missing textures on the clock, oldap fizzler
- Optimized some materials

- Fixed missing textures in pbr_zoo.bsp
- Added new underground frame models
- Added pbr dev textures
- Added a proper .rect file for the glass