Add Vagrant VM configuration

I've added a [Vagrant](http://vagrantup.com) config that brings up Might Zeal on a basic Nginx + PHP-FPM stack.

Port 80 forwards to `localhost:8080`.

```
$ vagrant up
$ curl localhost:8080/PuppetMaster.php; echo
Everything seems OK
$ curl localhost:8080/PuppetMaster.php?com=testCardMove; echo
object(Game)#1 (2) {
  ["playingField"]=>
  object(PlayingField)#2 (1) {
    ["environment":protected]=>
    int(0)
  }
  ...
}
```