Allow manifest_file to be a directory for Puppet Masterless Porvisioner

Fix link to shell provisioner [skip ci]

Escapes cp alias, fixes #1656

Changed type of version.number / vagrant-cloud post-processor
Fixes #1735 

Added Chocolatey as alternative installation [skip ci]

Fix typo: One attached -> Once attached [skip ci]

A few weeks ago ... the version.number changed from an integer to a
semver based string.

I guess version.number and version.version are equals now. So
version.version can be used.

This commit should fix #1735

fix passing bootstrap_args to bootstrap script (issue #1235)

update default output to reflect current packer release

Updated the spot price docs

Puppet is removing support for imports and node inherits. This change will support directories as manifests

https://docs.puppetlabs.com/puppet/latest/reference/dirs_manifest.html
https://docs.puppetlabs.com/puppet/latest/reference/lang_import.html

fixed `packer --version` to show version again

Fix broken links in the DigitalOcean documentation

atlas post-processor on 32bit uint32 overflows int

post-processor/atlas/util.go:16: constant 4294967295 overflows int
Signed-off-by: BlackEagle <ike.devolder@gmail.com>

atlas post-processor unknown atlas.UploadartifactOpts field BuildId

in https://github.com/hashicorp/atlas-go/blob/master/v1/artifact.go
we can see it is BuildID and not BuildId
Signed-off-by: BlackEagle <ike.devolder@gmail.com>

Resource pool defaults

builder/digitalocean: default to nyc3