Descent a4a

Addressed a whole bunch of feedback. Will watch the situation around C, might change more. Added another path for RED to B.

-Actually fixed the door situation this time
-Un-messed-up the areaportals

Went better than I expected, really.
-Addressed a ton of feedback, many minor changes
-Made the shortcut door from BLU spawn to D actually work (oops)
-Added some more signage and lights to combat the Hydro feeling
-Made life for BLU a little harder by opening doors later and slowing cart progress

Completely redid the light in the map, brightened some dark places, fixed LDR lighting. Oh, and closed a route that made defending C unlikely.

Turns out compile parameters work differently than I thought they did