alphagov/rummager — pull request #307 by jamiecobbett (2014-10-31 15:42:05+00:00)
Title: Helpful error for unconfigured document types

Previously this was giving:
```
NoMethodError - undefined method `[]' for nil:NilClass:
/var/govuk/rummager/lib/document.rb:16:in `from_hash'
```