Simple tutorial application 309

Fixes #309 
Doesn't work, unfortunately:

```
itamarst@paine:/tmp$ cp /home/itamarst/Customers/HybridLogic/flocker/docs/_build/html/_downloads/Vagrantfile .
itamarst@paine:/tmp$ vagrant up
Bringing machine 'node1' up with 'virtualbox' provider...
Bringing machine 'node2' up with 'virtualbox' provider...
There are errors in the configuration of this machine. Please fix
the following errors and try again:

File provisioner:
* File upload source file /tmp/clusterhq-flocker.repo must exist
```