Initial Xcode 5 compatible plugin

From the [docs](https://developer.apple.com/library/mac/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html), it's the opposite. For `Application Support`: 

```
Use this directory to store all app data files except those associated with the user’s documents. For example, you might use this directory to store app-created data files, configuration files, templates, or other fixed or modifiable resources that are managed by the app.
```

For `Preferences`:
```
You should not create files in this directory yourself. Instead, use the NSUserDefaults class or CFPreferences API to get and set preference values for your app.
```