Create a normalized stacked bar chart in d3 (without the stack layout).
The CSV file can contain any number of groups and up to 8 categories. It must not have a total row at the bottom; that row is calculated with Javascript.
Libraries: d3.js, underscore.js, jQuery
https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js
https://d3js.org/d3.v4.min.js
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js