Could you add some documentation?

Hi there!

Thanks for your work, the demo looks great!

I was wondering if you could add some basic documentation to the code and some words in your readme.

I would be interested in using this to generate color schemas for charts in [Britecharts](http://eventbrite.github.io/britecharts/). It could make for a nice demo to apply your algorithm to a chart.

Thanks again!

Start by reviewing the JavaScript code and the repository README to identify what the algorithm does and which usage details are missing. The issue requests basic code documentation and README content, with a possible Britecharts demo; done means the requested documentation and usage explanation are added, with any demo scope clarified first.

Written by the indexing model from the issue text.