objcio/issue-4-core-data-migration — pull request #1 by samnung (2014-08-19 09:11:02+00:00)
Title: fixed recursion issue in searching mapping model

```
[NSMappingModel mappingModelFromBundles:@[[NSBundle mainBundle]]
forSourceModel:sourceModel
destinationModel:model];
```

when params sourceModel and model are equal (v2), this method returns mapping model from v2 to v3

see this diff https://gist.github.com/pnc/2321704