Fix potential conflict with other addons (Merged Pull Request)

Restore the entity's shadow

Merge pull request #4 [github.com]

Optimize FOV checks [github.com]
Microoptimization & Support for the fog's Far Z Clip Plane [github.com]

• Dead NPCs now actually hide
  
• Proper player check
  
• Somewhat proper compatibility with RT cameras

• Reconsidered the way entity's data is stored
  
• Micro-optimizations
  
• Improved calculations logic
  
• Advanced way of controlling visibility
  
• Refactor code

Restyle and restructure code [github.com]
Fixed visible dead NPCs. Now we don't have to exclude NPCs [github.com]
Improve calculations logic. Resolve flickering issue [github.com]

Minor improvements
Resolved compatibility issue with BSMod KillMoves
Added new parameter r_performant_excludenpcs

See commit here [github.com]

Style cleanups.
Improvements.
Added new console variable r_performant_cutbeyondfog

See commit here [github.com]

Minor change

Little improvements

• Optimize FOV calculations
  
• Fix typo