typus/typus — pull request #462 by tkoenig (2014-11-20 11:07:44+00:00)
Title: Fix csv export

This fixes the csv export when a related model does not exist.

example:
```
Store:
fields:
default: id, name, country.name, state.name, city.name, zip_code, street
```
This currently breaks if country,state or city is nil.

This fix should/could probably be applied in the stable branches as well.