Added a progressbar using gopkg.in/cheggaaa/pb.v1 as per #3578 for all the DownloadClients in common/download.go.
Added a progressbar using gopkg.in/cheggaaa/pb.v1 as per #3578 for all the DownloadClients in common/download.go.

p1-nico/packer,pecigonzalo/packer,rnaveiras/packer,paulmey/packer,pieter-lazzaro/packer,grubernaut/packer,hashicorp/packer,p1-nico/packer,mitchellh/packer,ChrisLundquist/packer,bryson/packer,KohlsTechnology/packer,mkuzmin/packer,youhong316/packer,ChrisLundquist/packer,hashicorp/packer,pieter-lazzaro/packer,timsutton/packer,bryson/packer,ChrisLundquist/packer,tb3088/packer,rnaveiras/packer,ricardclau/packer,tb3088/packer,grubernaut/packer,youhong316/packer,grubernaut/packer,mkuzmin/packer,routelastresort/packer,pecigonzalo/packer,mkuzmin/packer,bryson/packer,paulmey/packer,timsutton/packer,pecigonzalo/packer,KohlsTechnology/packer,bryson/packer,dave2/packer,mitchellh/packer,KohlsTechnology/packer,mkuzmin/packer,rnaveiras/packer,KohlsTechnology/packer,ricardclau/packer,tb3088/packer,paulmey/packer,dave2/packer,paulmey/packer,pieter-lazzaro/packer,dave2/packer,p1-nico/packer,grubernaut/packer,tas50/packer,routelastresort/packer,paulmey/packer,ricardclau/packer,pieter-lazzaro/packer,timsutton/packer,dave2/packer,ricardclau/packer,KohlsTechnology/packer,mkuzmin/packer,mkuzmin/packer,mitchellh/packer,hashicorp/packer,mitchellh/packer,paulmey/packer,tb3088/packer,tas50/packer,tas50/packer,rnaveiras/packer,tas50/packer,ChrisLundquist/packer,KohlsTechnology/packer,mitchellh/packer,tb3088/packer,dave2/packer,pecigonzalo/packer,routelastresort/packer,youhong316/packer,tas50/packer,rnaveiras/packer,timsutton/packer,dave2/packer,pieter-lazzaro/packer,youhong316/packer,timsutton/packer,youhong316/packer,pieter-lazzaro/packer,rnaveiras/packer,ricardclau/packer,routelastresort/packer,ricardclau/packer,p1-nico/packer,bryson/packer,youhong316/packer,p1-nico/packer,hashicorp/packer,ChrisLundquist/packer,tas50/packer,bryson/packer,grubernaut/packer,routelastresort/packer,grubernaut/packer,ChrisLundquist/packer,p1-nico/packer,tb3088/packer,timsutton/packer