Greatly expanded playable area

Completely overhauled 3D Skybox

More AI nodes and a functional navmesh (day version only)

Modifications to the HQ
- Three new rooms
- More minor details and changes

New buildings with full interiors, including but not limited to the following:
- Apartment building
- Jazz bar
- Gas station
- Café
- Hardware store
- Gun store that doubles as a clothing store
- Other secret rooms

New outdoor locations
- Basketball court
- Skatepark
- Beach
- Park

Tons of other minor unmentioned details and new secrets to find :)

- Replaced content that required HL2: EP2
- Added a rock next to the bus stop
- Implemented AI nodes into the map, kinda
- More minor stuff