Add npm start script.
Add npm start script.

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