add vcs and use timestamp for version
add vcs and use timestamp for version

ifosch/atlas-packer-vagrant-tutorial,york-cs-dams/box,bravepickle/docktor-master-test,automatelife/atlas-packer-vagrant-tutorial,ImpressCMS/packer-impresscms-devbox,ianunruh/packer-vagrant-ubuntu,toff63/consul-packer-atlas-box,tcnksm/vagrant-box-golang,hashicorp/atlas-packer-vagrant-tutorial,celebdor/packer_ost_midonet,a-h/atlas-oracle-linux-for-vagrant,leapcode/packer_vagrant,wzur/vagrant-boxes-ubuntu,ckelner/atlas-packer-example,ajlanghorn/vagrant-ubuntu-cis-level1,Ecodev/atlas-packer-vagrant-ubuntu14,ImpressCMS/packer-impresscms-devbox,otwcode/ao3_vagrant,NuCivic/packer-dev-vm,ImpressCMS/packer-impresscms-devbox,catsby/golang-base,otwcode/ao3_vagrant,recamshak/dev-box,zjiang91/tenentvm,xhawk/2sasidev,virajs/atlas-packer-vagrant-tutorial,kedazo/ubuntu1604_packer_template,catsby/golang-base,ivankristianto/devstack-packer,xhawk/2sasiproto64,Aetheros/devkitarm-packer