do not expose multifile assets. fixes gh-237
do not expose multifile assets. fixes gh-237

to add a local unzipped shapefile, you have to specify the absolute path when adding.

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