Upgrade to Vagrant 1.1

This PR does a few things:

* Locks Berkshelf to the new 1.3 series that is compatible with Vagrant 1.1
* Locks to the latest alpha release of test-kitchen
* Adds the kitchen-vagrant plugin
* Removes the no-longer needed Vagrant file (this is generated on-the-fly with the updated kitchen-vagrant plugin)

Overall this helps upgrade the testing setup so we can start going through and testing pull requests and investigating issues. I'll add in some README help to both this PR and one separately on kitchen-vagrant with some instructions on how to test against this new system.

My current level of excitement to get moving on merging a bunch of pull requests:
![4NYwh](https://f.cloud.github.com/assets/724/320977/d1830a7e-9981-11e2-8676-989f1167ab1c.gif)