Create blogs given from parameters

Right now, the example puppet code of:

```puppet
 class { ghost:
   blogs => {
     # The name, url, and port must be different per instance!
     'my_blog' => {
       'url'  => 'http://my-first-ghost-blog.com',
     }
   }
 }
```

doesn't actually work. It'll create the ghost user and group, but won't actually make the ghost::blog resource. Adding a create_resource with the parameters will fix this issue :+1: