Windows support + box

[chrnie]

I'v added a ":communicator" variable to nodes.json and recognized that the ":box" variable is invoked in the wrong scope in Vagrantfile.

To get Windows Support I added a node like this:
"win31": {
":ip": "192.168.35.31",
"ports": [
{
":host": 3389,
":guest": 3389,
":id": "win-rpd"
}
],
":memory": 2048,
":communicator": "winrm",
":box": "opentable/win-2012r2-standard-amd64-nocm",
":bootstrap": "bootstrapWin2012.ps1"
}

I had to change the Vagrantfile to:
[...]
config.vm.define node_name do |config|
config.vm.box = node_values[':box']
config.vm.communicator = node_values[':communicator']
# configures all forwarding ports in JSON array
ports = node_values['ports']
ports.each do |port|
[...]

Perhaps you know how to set a default to ":communicator" because I have to set
":communicator": "ssh",
to all linux nodes.