review and upload data to data.world

[msmerlak]

For the hackathon I downloaded economic inequality data from an Economic Policy Institute paper. Right now it's in data-raw/sommeiller_et_al_2016. Please have a look at it and decide if it deserves to be uploaded to data.world

[chrisdick14]

I will take a look over the next couple of days. I am sure it is worth putting on there!