v1.3.0

DitherPunk v1.3.0

Diff since v1.2.1

Closed issues:

• Include all ordered dithering methods available in ImageMagick (#22)
• Add package benchmarking (#35)
• Ordered dithering threshold matrices should not start at zero (#43)

Merged pull requests:

• Update doc landing page and API reference (#40) (@adrhill)
• Add package benchmarks (#41) (@adrhill)
• Include threshold matrices from ImageMagick (#42) (@adrhill)
• Fix ordered dithering matrices (#44) (@adrhill)