Allow spaces in layer classes. Fixes #175.
Allow spaces in layer classes. Fixes #175.

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