Cleanups of map handling.
Cleanups of map handling.

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