0.0.3

• fixed dithering really, artifacts have been fixed (mostly)
• added floyd-steinberg dithering method --dither floydsteinberg
• shortcuts for floyd-steinberg (-d fs), sierra-lite (-d sl)
• RGBA, RGB, Luma, LumaAlpha color type support

0.0.2

fixed sierra lite dithering and added flag -d, --dither

0.0.1

basic octree, sierra lite dithering, basic cli