Clarifications on how `vagrant-chef` relates to a CakePHP project

The readme was sugesting cloning the repo, which created a `.git` folder of `vagrant-chef`, which in turn made me think that my project's code (and it's own `.git` folder) should be put somewhere else.

I've made it clear that `vagrant-chef`'s files should be added to project source.

I've changed the `git clone` command with this one:

```bash
wget https://github.com/FriendsOfCake/vagrant-chef/archive/master.tar.gz -O - | tar -xz --strip-components 1
```

It will download the source code of `vagrant-chef` into current folder without creating a local `.git` repo. It can be used both for existing project and for a blank folder (provided that you `mkdir` and `cd` first).