Fix for the earlier fix

Bug fixes on Jeff's wandering

Added autosaves and masks only for accessibility

More improvements to Jeff's wandering

Added improvements for Jeff's navigation

Update V4 is here! Do try it out and let me know if it's too easy.

Fixed:
Made warehouse puzzle more obvious
Fixed some issues in the basement tunnel
Fixed combine solider rendering issue at the start

Update:
1) Fixed lighting in tunnel
2) Made warehouse ceiling and mezzanine taller
3) Fixed logic allowing players to move past Jeff in the first room
4) Add logic to prevent player from progressing without getting access to grenades in first room
5) Fixed level end

lighting fix

Added:
- 2k light maps
- fixed headcrab bug
- fixed jeff's exit