Feature Data in Dellert's Northeuralex

https://github.com/jdellert/icon-evol/blob/master/code/src/main/resources/sound-group-definitions.tsv

Published along with this paper: https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2020.0190

The feature agglomeration will need extra code, but one could extract all tokens from NorthEuralex and then assign them.