website: really fix puppet provisioner cmd docs
Merge pull request #789 from bpot/puppet_default_really_correct

website: really fix puppet provisioner cmd docs
builder/virtualbox,vmware: checksum not required if checksum type is
none
includes information about "provider"
Merge pull request #791 from stefanfoulis/patch-1

website: includes information about "provider"
Merge branch 'master' of https://github.com/mitchellh/packer into docker-metadata