Fixed missing env_fire entities on fire plinths

- Added additional viewing gallery themed map
- Fixed misaligned pillar
- Fixed incorrect item placements that were clipping through geometry

Changed lightmap scale on brush faces in main chamber (original map only, compile time for toxic map was too long) to improve shadow quality

Improvements to lighting and sunshadows

- Moved light_environment and shadow_control entities for better lighting
- Compiled with CSM Shadows

Added toxic goo version of map

- Sunshadows set to better angle, Light_environment set to values more suitable for this skybox. Should improve shadowing/lighting.

- Lighting in all rooms tweaked for better visuals, to coincide with other changes mentioned

Added kill trigger to icthyosaur water to prevent players jumping in the water and getting stuck