v1.1.6

• add bantu.features() function API for Bantu Basic Vocabulary Database (by Anna Smirnova, #67)
• replace glottolog with one from Glottolog database 4.4 as CLDF (https://github.com/glottolog/glottolog-cldf)
• add country.lang() and subc.lang() functions for geting countries and subclassification in the Newick tree format