sync variant => https://github.com/mapbox/variant/commit/cd8fe9ce3f866696471affd8ca52c20a7ed23263
sync variant => https://github.com/mapbox/variant/commit/cd8fe9ce3f866696471affd8ca52c20a7ed23263

CartoDB/mapnik,lightmare/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,pnorman/mapnik,CartoDB/mapnik,naturalatlas/mapnik,zerebubuth/mapnik,mapnik/mapnik,tomhughes/mapnik,pnorman/mapnik,lightmare/mapnik,mapycz/mapnik,mapnik/mapnik,CartoDB/mapnik,naturalatlas/mapnik,tomhughes/mapnik,zerebubuth/mapnik,tomhughes/mapnik,pnorman/mapnik,zerebubuth/mapnik,mapycz/mapnik,lightmare/mapnik,tomhughes/mapnik,mapnik/mapnik,lightmare/mapnik,mapnik/mapnik,pnorman/mapnik,mapycz/mapnik