IMAGEGALLERY{"topic" options...} -- render an image gallery

• The %IMAGEGALLERY{"topic"}% macro is handled by the ImageGalleryPlugin.
• Syntax: %IMAGEGALLERY{"topic" options...}%
• Examples:
  • =%IMAGEGALLERY{"System.DocumentGraphics" columns="3" limit="12" exclude="arrow" sort="name"}%
• Related: NRIMAGES, ImageGalleryPlugin