download mason packages in batches to avoid overloading https connections
download mason packages in batches to avoid overloading https connections

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