minor updates to docs
minor updates to docs

ricardclau/packer,tb3088/packer,youhong316/packer,tb3088/packer,mkuzmin/packer,paulmey/packer,tas50/packer,KohlsTechnology/packer,dave2/packer,dave2/packer,rnaveiras/packer,KohlsTechnology/packer,youhong316/packer,timsutton/packer,tb3088/packer,mitchellh/packer,mitchellh/packer,mitchellh/packer,hashicorp/packer,KohlsTechnology/packer,pecigonzalo/packer,grubernaut/packer,paulmey/packer,youhong316/packer,youhong316/packer,ricardclau/packer,mkuzmin/packer,mitchellh/packer,ricardclau/packer,pecigonzalo/packer,bryson/packer,rnaveiras/packer,mitchellh/packer,dave2/packer,timsutton/packer,rnaveiras/packer,timsutton/packer,paulmey/packer,grubernaut/packer,timsutton/packer,hashicorp/packer,KohlsTechnology/packer,mkuzmin/packer,KohlsTechnology/packer,paulmey/packer,rnaveiras/packer,tb3088/packer,grubernaut/packer,pecigonzalo/packer,bryson/packer,grubernaut/packer,tas50/packer,timsutton/packer,paulmey/packer,youhong316/packer,hashicorp/packer,pecigonzalo/packer,tas50/packer,dave2/packer,youhong316/packer,tas50/packer,hashicorp/packer,ricardclau/packer,grubernaut/packer,tas50/packer,ricardclau/packer,rnaveiras/packer,mkuzmin/packer,tb3088/packer,bryson/packer,tb3088/packer,ricardclau/packer,mkuzmin/packer,rnaveiras/packer,tas50/packer,dave2/packer,grubernaut/packer,KohlsTechnology/packer,timsutton/packer,bryson/packer,paulmey/packer,dave2/packer,bryson/packer,mkuzmin/packer,bryson/packer