Add safeguards against invalidity of the local player

Fix incorrect variable

• Reinvented SuperDoF's implementation.
  Now it creates corresponding & correct floating-point texture to work with.
  
  Everything should be fine with applying SuperDoF now.
  
• Now the maximal resolution of the screenshot matches that of the GPU, which is more truthful.
  
• Added displaying the current stage and progress of taking the screenshot.
  
• Added option for applying HDR effects to the screenshot.
  
• Added options for choosing color depth.
  Image data formats are being used under the hood.
  
  Just so that you know, this thing is inflexible because they are pre-compiled in the game.
  
• Added option for hiding spawned cameras (from Tool Gun).
  
• Rewrited how the SuperDoF menu is being modified.
  Now there's separate button for the addon.
  
• Refactored code.

Fixed a mismatched method.

fix error

• Now SuperDoF is applying properly in full resolution. Previously, it was just stretching the SuperDoF result to fit the screenshot, which wasn't good.
  
• Anti-Aliasing!
  
• Proper method of applying post-processing
  
• Completely refactored code.

• Compatibility with default GMod static camera

• Fixed an issue with ARC9 where the Customization Menu refuses to open. This fix should also resolve issues with other addons, such as ragmod and gredwitch base