Merge branch '1064-fix-upload-file-permissions' of github.com:rasa/packer into rasa-1064-fix-upload-file-permissions

Conflicts:
	builder/parallels/common/step_upload_parallels_tools.go
	builder/vmware/common/step_upload_tools.go
	provisioner/chef-client/provisioner.go
	provisioner/chef-solo/provisioner.go

post-processor/compress Add support for artifact compression.

parallels-iso: allow absolute output directory.

Fixes [GH-1466]

Add the cleanup when the process of EBS AMI interrupted

Merge branch 'add-spot-instance-support' of github.com:henrysher/packer into henrysher-add-spot-instance-support

Conflicts:
	builder/amazon/common/run_config.go
	builder/amazon/ebs/builder.go
	builder/amazon/instance/builder.go

Conflicts:
	packer/config_template.go
	website/source/docs/templates/configuration-templates.html.markdown

common: Fixes #1114, Adds upper and lower as filters for the template engine.

Merge branch 'add-chef-environment' of github.com:cfortier2/packer into cfortier2-add-chef-environment

Conflicts:
	provisioner/chef-client/provisioner.go

[GH-1388]