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"
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