Add wiki page for local cluster setup.

Hi All,

I was working in getting the guestbook working in a local cluster. I thought it might be useful to have some detailed instructions about how to do this. Basically, I'm taking the guestbook and making some slight changes to make it work locally. 

Also, I added a vagrant file with some provisioning to set up a virtual machine ready to run Kubernetes locally. 
oh this was just to have a faster feedback loop when going through the examples, otherwise the first time you create a pod the operation stays a long time working. When re-basing with #550, I could add it just as step in the instructions and mention that is not really needed.