Issue #141 Add Vagrantfile to automate dev environment

Problem:
There is no automated way to setup a build environment.

Solution:
Use Vagrant to pull an Ubuntu image and install the same
prerequisites used on Travis.

Testing:
Full build on my macintosh.

Vagrantfile

@@ -0,0 +1,23 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.configure("2") do |config|
+  # Every Vagrant development environment requires a box. You can search for
+  # boxes at https://vagrantcloud.com/search.
+  
+  config.vm.box = "ubuntu/trusty64"
+  
+  # use shell and other provisioners as usual
+  config.vm.provision :shell, path: "bootstrap.sh"
+  
+  config.vm.provider "virtualbox" do |v|
+    v.memory = 1024
+    v.cpus = 4
+  end
+  config.vm.provision "shell" do |s|
+    s.inline = <<-SCRIPT
+      # Change directory automatically on ssh login
+      echo "cd    /vagrant" >> /home/vagrant/.bashrc
+    SCRIPT
+  end
+end