Generate letter avatar from username.

Shamelessly copied from alchemic_avatar and slightly modified with this code sample originally written by Sergio Tapia

A palette generated from:

iwanthue

System requirements

$ sudo apt-get install -y imagemagick

Mac OS X

$ brew install imagemagick ghostscript

If available in Hex, the package can be installed by adding abatap to your list of dependencies in mix.exs:

def deps do
  [
    {:abatap, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/abatap.