Change Log

• Fixes some PHP 8 warnings.
  
• Adds (experimental) support for detecting animated GIFs/PNGs, and optionally resizing them or excluding them from resizing.
  
• Adds settings to stipulate usergroups and forums to be excluded from image auto-resizing.
  
• Adds support for watermarking images, including the ability to automatically back up original, pre-watermarked images.
  
• Adds some other miscellaneous improvements.