zs_apex_v3:

- Converted more brushes to func_detail
- Added info_sigilnode entities
- Added spawn in zombiegas above hallway
- Set vent grills “Break on …” flags
- Replaced collision mesh of ladder with brush
- Added func_clip_vphysics to elevator doors

zs_apex_v2:

- Made elevator less exploitable
- Packed HL2 EP1 & 2 Content
- Lighting fixes
- Other small fixes