0.2.0

• Update general dither method to include a quantizer
• Add built in support for grey scale palettes
• Formatting cleanup

0.1.0

Initial release, supporting two primary classifications of algorithms:

1. Ordered Dithering: This is a fast dithering algorithm that uses a matrix of predefined values to vary what color is selected.
2. Error Diffusion: A slightly slower dithering algorithm that tracks the error incurred when a color is clamped to the palette, then distributes that error to surrounding pixels.