add some more comments
add some more comments

grubernaut/packer,mitchellh/packer,grubernaut/packer,ricardclau/packer,paulmey/packer,dave2/packer,grubernaut/packer,mitchellh/packer,rnaveiras/packer,grubernaut/packer,mitchellh/packer,rnaveiras/packer,rnaveiras/packer,paulmey/packer,mitchellh/packer,paulmey/packer,hashicorp/packer,ricardclau/packer,rnaveiras/packer,dave2/packer,rnaveiras/packer,pecigonzalo/packer,dave2/packer,ricardclau/packer,ricardclau/packer,grubernaut/packer,pecigonzalo/packer,pecigonzalo/packer,rnaveiras/packer,mitchellh/packer,ricardclau/packer,dave2/packer,hashicorp/packer,hashicorp/packer,paulmey/packer,pecigonzalo/packer,ricardclau/packer,paulmey/packer,dave2/packer,dave2/packer,paulmey/packer,grubernaut/packer,hashicorp/packer