drapergem/draper — pull request #566 by jgraichen (2013-07-24 09:36:16+00:00)
Title: Add activemodel runtime dependency.

Draper requires activemodel in `lib/draper.rb` line 2-4 but does not declare it as a dependency.

When using draper outside a full rails environment it fails with a LoadError:
```
draper/lib/draper.rb:2:in `require': cannot load such file -- active_model/naming (LoadError)
```

Draper tests are passing because development dependency `active_model_serializers` has `active_model` as a dependency.