refs #605: move to commit count instead of git hash for build number
refs #605: move to commit count instead of git hash for build number

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