Add data directory to ubuntu install script.
Add data directory to ubuntu install script.

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