Cleaned up dev build instructions from gh-pages branch.
Cleaned up dev build instructions from gh-pages branch.

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