Adjust README for npm building.
Adjust README for npm building.

MappingKat/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,paulovieira/tilemill-clima,paulovieira/tilemill-clima,paulovieira/tilemill-clima,mbrukman/tilemill,nyimbi/tilemill,tilemill-project/tilemill,paulovieira/tilemill-clima,florianf/tileoven,MappingKat/tilemill,fxtentacle/tilemill,paulovieira/tilemill-clima,Teino1978-Corp/Teino1978-Corp-tilemill,nyimbi/tilemill,mbrukman/tilemill,mbrukman/tilemill,fxtentacle/tilemill,Zhao-Qi/tilemill,tizzybec/tilemill,tizzybec/tilemill,mbrukman/tilemill,Zhao-Qi/tilemill,MappingKat/tilemill,fxtentacle/tilemill,tizzybec/tilemill,isaacs/tilemill,tizzybec/tilemill,tilemill-project/tilemill,florianf/tileoven,isaacs/tilemill,nyimbi/tilemill,fxtentacle/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,Zhao-Qi/tilemill,mbrukman/tilemill,nyimbi/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,tilemill-project/tilemill,tizzybec/tilemill,isaacs/tilemill,MappingKat/tilemill,nyimbi/tilemill,florianf/tileoven,MappingKat/tilemill,fxtentacle/tilemill