Fix some missing textures I didn't notice

Large update with many rooms re-textured and detailed using CS:S models and textures

Some more details in the horse room

Big update... I've been busy with work so I haven't had much time to update this map frequently.

I have worked on stuff whenever I find the time though, and I thought I might as well update what I have.

A bunch of new areas have just been added including:
- Art room
- Waiting room
- Shower room
- STARS room (will eventually be a traitor room)
- East side alley connecting outdoor areas
- More stuff...

A lot of things are probably still broken!

Update icon

AAA!!