added ssh.proxy_command to handle waiting for aws ssh connection when ssh proxy in place.  use config.ssh.proxy_command = "ssh -q <user>@<proxy_host> nc %h %p"
Comment typo fixes

Only comment changes.

Removed stray apostrophe from Util::Downloader.initialize() doc block. Corrected open => options for .download! description.
Add missing Vagrantfile docs
Merge pull request #2122 from psi/docs-fixes

website/docs: add missing Vagrantfile docs
Merge pull request #2120 from beporter/comment-typo-fixes

core: comment typo fixes
Ignore only root Vagrantfile
website/www: note compatible VMware versions
provisioners/all: report proper invalid keys [GH-2117]
Merge pull request #1537 from wormzer/master

communicator/ssh: Additional proxy_command option
Update CHANGELOG
core: exec with the proxy command if specified
provisioners/chef: chown/create folder before access [GH-2121]
v1.3.0

This will actually be released tomorrow, most likely, but I want
to get the installers all ready.
Up version for development
Vagrant docs: added most awaited keys for VMX customisation
core: dup the synced folder options [GH-2134]
core: dup option hashes everywhere
Merge pull request #2127 from herdani/patch-1

website/docs: added most awaited keys for VMX customisation
website/docs: update vmx wordings
core: VAGRANT_VAGRANTFILE affects only project vagrantfile [GH-2130]