Prevent duplicate project names. Fixes #60.
Prevent duplicate project names. Fixes #60.

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