Added Vagrant configuration cookbook

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes
| Applies to    | all
| Fixed tickets | n/a

A new cookbook article was added with an example Vagrant configuration that can be used with the Symfony Standard Edition.
Those facter settings are required.  It's been awhile but I believe the `fqdn` setting is related to the `apache::vhost` configuration.  The `host_ipaddress` was added to include an explicit way to provide the IP address necessary (without having to worry about the potential for multiple network adapters) to allow the `web/app_dev.php` file localhost check to work.