Add vagrant setup for local testing

.gitignore

@@ -1,3 +1,4 @@
 tests/dokku
 tests/fixtures
 tests/bin/plugn
+.vagrant

Vagrantfile

@@ -0,0 +1,30 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+BOX_NAME = ENV["BOX_NAME"] || "bento/ubuntu-14.04"
+BOX_MEMORY = ENV["BOX_MEMORY"] || "512"
+DOKKU_VERSION = "master"
+
+Vagrant.configure(2) do |config|
+  config.vm.box = BOX_NAME
+  config.ssh.forward_agent = true
+
+  config.vm.provider :virtualbox do |vb|
+    # Ubuntu's Raring 64-bit cloud image is set to a 32-bit Ubuntu OS type by
+    # default in Virtualbox and thus will not boot. Manually override that.
+    vb.customize ["modifyvm", :id, "--ostype", "Ubuntu_64"]
+    vb.customize ["modifyvm", :id, "--memory", BOX_MEMORY]
+  end
+
+  config.vm.provider :vmware_fusion do |v, override|
+    v.vmx["memsize"] = BOX_MEMORY
+  end
+
+  config.vm.define "default", primary: true do |vm|
+    vm.vm.synced_folder File.dirname(__FILE__), "/vagrant"
+
+    vm.vm.provision :shell, :inline => "apt-get update > /dev/null && apt-get install -y -qq git software-properties-common"
+    vm.vm.provision :shell, :inline => "cd /vagrant && DOKKU_VERSION=#{DOKKU_VERSION} make setup"
+    vm.vm.provision :shell, :inline => "cd /vagrant && DOKKU_TRACE=1 DOKKU_VERSION=#{DOKKU_VERSION} make test"
+  end
+end