a Perl graphic toolkit

Changes for 1.70 - 2023-09-03

• Use fading effects in widgets
• Solidify emulated 2D transformations with images
• Animation is using core image processing instead of DeviceBitmap
• Path rendering is optimized for widened arcs and splines
• Add Widget.is_surface_buffered to check if .buffered(1) was respected
• Edit.find() changed the coordinate system used, from visual to physical
• Core Icon.put_image(Icon) will affect the destinations 1-bit mask
• Image.premultiply_alpha(constant) will work on palettes when bpp <= 8
• Add Image.to_colormask
• Add --no-xrender-matrix command line switch for x11 builds