ported https://bost.ocks.org/mike/bar/3/ to d3 version 4
added resizing inspired by https://chartio.com/resources/tutorials/how-to-resize-an-svg-when-the-window-is-resized-in-d3-js/
turned axis labels inspired by d3noobs https://bl.ocks.org/d3noob/3c040800ff6457717cca586ae9547dbf
data from https://www.gapminder.org/data/ from http://www.forbes.com/sites/bernardmarr/2016/02/12/big-data-35-brilliant-and-free-data-sources-for-2016/#57c695bb6796