Fix typo in docker builder docs
parallels-iso: ISO not removed from VM after install [GH-1338]

Also remove floppy and prl-tools ISO if applicable.
Merge pull request #1398 from rickard-von-essen/issue_1338

parallels-iso: ISO not removed from VM after install [GH-1338]
add disk size to google compute, so as to avoid disk size errors on exporting the image
Merge pull request #1397 from jfrazelle/disk_size

add disk size to google compute
fix panic when vagrant cloud response fails
Update CHANGELOG.md
Merge pull request #1362 from pmorie/docs

Fix typo in docker builder docs
Merge pull request #1411 from chrisfarms/master

fix panic when vagrant cloud response fails
salt provisioner: require local_state_tree
salt provisioner: tidy up and refactor into functions