Vagrantfile: Add support for VMWare Fusion provider

As a user who has blown $150 on VMWare Fusion and vagrant-vmware, I
would like to use my new shiny to hack on Docker. Docker already has a
multi-provider Vagrantfile, so adding another one presents little risk.

Known Issues:

- The docker install of a new kernel breaks the Vagrant shared folder.
    - This seems to be because the VMWare hgfs module doesn't build
      against a 3.8 kernel.
    - I don't believe that shared folder support is actually in use

Vagrantfile

@@ -3,6 +3,7 @@
 
 BOX_NAME = ENV['BOX_NAME'] || "ubuntu"
 BOX_URI = ENV['BOX_URI'] || "http://files.vagrantup.com/precise64.box"
+VF_BOX_URI = ENV['BOX_URI'] || "http://files.vagrantup.com/precise64_vmware_fusion.box"
 AWS_REGION = ENV['AWS_REGION'] || "us-east-1"
 AWS_AMI    = ENV['AWS_AMI']    || "ami-d0f89fb9"
 FORWARD_DOCKER_PORTS = ENV['FORWARD_DOCKER_PORTS']
@@ -67,6 +68,13 @@ Vagrant::VERSION >= "1.1.0" and Vagrant.configure("2") do |config|
     rs.image    = /Ubuntu/
   end
 
+  config.vm.provider :vmware_fusion do |f, override|
+    override.vm.box = BOX_NAME
+    override.vm.box_url = VF_BOX_URI
+    override.vm.synced_folder ".", "/vagrant", disabled: true
+    f.vmx["displayName"] = "docker"
+  end
+
   config.vm.provider :virtualbox do |vb|
     config.vm.box = BOX_NAME
     config.vm.box_url = BOX_URI