Visual update!

I took a much needed break (albeit short) from mapping on this project. That really helped.

+Added Cubemaps (Ooh, shiny surfaces!)
+Added some lights (It's still darker than it should be)
+Optimized the map a bit more (It runs better now!)
+Fixed a Cave Johnson line not playing when exiting the test (Moar angery wastern man!)

-Removed visual clutter.

Updated visuals.

- Added Projected Textures
- Changed some textures for better looks
- Cleaned up logic
- Made elevator button not so difficult to trigger
- Added lights in the unseen chamber
- Turned off World Fade. No more black fade-ins on every load!