* Packaging following source, and enable these builders.
  + hcloud: github.com/hetznercloud/hcloud-go
  + ncloud: github.com/NaverCloudPlatform/ncloud-sdk-go
  + 1&1: github.com/1and1/oneandone-cloudserver-sdk-go
  + oracle-classic: github.com/hashicorp/go-oracle-terraform
  + oracle-oci: github.com/oracle/oci-go-sdk
  + profitbricks: github.com/profitbricks/profitbricks-sdk-go
  + scaleway: github.com/scaleway/scaleway-cli
  + triton: github.com/joyent/triton-go
* Packaging new golang-github-azure-azure-sdk-for-go-dev to
  bring back azure builder.

* Packaging github.com/ulikunitz/xz for xz compression.

* Packaging following source, and enable these template functions.
  + sed: github.com/rwtodd/Go.Sed/sed
  + vault: github.com/hashicorp/vault/api
  + consul_key: github.com/hashicorp/consul/api
