 Rewrite this to use the official node.js driver, which is pretty good now, and seems an order
 of magnitude faster than using the gcloud command line!
 
-https://googlecloudplatform.github.io/gcloud-node/#/docs/v0.23.0/compute/
+https://googlecloudplatform.github.io/gcloud-node/#/docs/v0.25.1/compute/
 https://github.com/GoogleCloudPlatform/gcloud-node
 
 npm install --save gcloud

            os          : undefined      # see https://github.com/stephenplusplus/gce-images#accepted-os-names
            tags        : undefined      # array of strings
            preemptible : false
            cb          : required
        dbg = @dbg("create_vm(name=#{opts.name})")
        config = {}

        config.machineType = opts.type  if opts.type?
        config.os          = opts.os    if opts.os?
        config.tags        = opts.tags  if opts.tags?

        config.networkInterfaces = [{network: 'global/networks/default', accessConfigs:[]}]
        if opts.external
            # Also grant external network access (ephemeral by default)
            config.networkInterfaces[0].accessConfigs.push(name: "External NAT", type: "ONE_TO_ONE_NAT")

        config.serviceAccounts = [{email:'default', scopes:[]}]
        if opts.storage
            config.serviceAccounts[0].scopes.push("https://www.googleapis.com/auth/devstorage.#{opts.storage}")

        if opts.preemptible
            config.scheduling = {preemptible : true}
        else
            config.scheduling =
                onHostMaintenance: "MIGRATE"
                automaticRestart: true

        if opts.disks?
            config.disks = []
            for disk in opts.disks
