0.4.0

• Load BMP, 1BPP, 2BPP, and LZ-compressed *BPP tileset graphics, not just PNG
• Add Tileset feature to load multiple graphics at once
• Remember recent tilesets as well as recent tilemaps
• Remove 16px Tiles option
• Keep the SGB color menu item and toggle switch in sync
• Fix some theme appearances

To do:

• Image to Tiles: Generate tilemaps and tilesets from images
• Partial tilesets: Support offset and length when adding tileset images
• .tileset files: Read and export lists of images with start+offset+length values