Oshuma/app_config — pull request #16 by mhfs (2013-04-24 17:08:38+00:00)
Title: Coerce HOME env var into string to avoid error in environments that doen't define it

I noticed it in an app init script. The app fails to boot with:

```
app_config/storage/yaml.rb:9:in `join': can't convert nil into String (TypeError)
```