Lessons learned
scaleOrdinal vs scaleLinear (only 2 colors!) vs interpolateCool vs d3.schemeColor20c
ribbon source vs index (change fill them differently)
https://github.com/d3/d3-scale-chromatic
https://bost.ocks.org/mike/uberdata/
http://bl.ocks.org/mbostock/1046712
https://bl.ocks.org/mbostock/4062006
http://projects.delimited.io/experiments/chord-transitions/demos/trade.html
https://github.com/jokecamp/sportdb-build-scripts
https://groups.google.com/forum/#!topic/opensport/593H1O7yIdE
https://github.com/openfootball/datafile/blob/master/worldcup.rb
https://openfootball.github.io/questions.html
TODO
move styling out of index.html
add team country population below team name
hide rounds
round persistence
sort persistence
better layout
better colors
webpack 2 / css modules?
add three.js sketchup clone to a list somewhere
tweet it!