merge d3.geo.tile changes from upstream
merge d3.geo.tile changes from upstream

openstreetmap/iD,edpop/iD,kepta/iD,openstreetmap/iD,1ec5/iD,mapmeld/iD,1ec5/iD,zbycz/iD,andreic-telenav/iD,ngageoint/hootenanny-ui,morray/iD,1ec5/iD,digidem/iD,energiekollektiv/openmod.sh-id,edpop/iD,kartta-labs/iD,edpop/iD,kepta/iD,ngageoint/hootenanny-ui,morray/iD,AndreasHae/iD,zbycz/iD,ngageoint/hootenanny-ui,bagage/iD,openstreetmap/iD,bagage/iD,andreic-telenav/iD,AndreasHae/iD,AndreasHae/iD,kartta-labs/iD,bagage/iD,mapmeld/iD,kartta-labs/iD,mapmeld/iD,tbicr/iD,energiekollektiv/openmod.sh-id,digidem/iD,tbicr/iD