Upgraded ember to v1.3.1 and changed deprecated properties...
Using ember-data for the model to make sure this doesn't cause
problems..
Switched to using the {{input}} for plain text fields and custom
components for the subclasses...
Using the default model name for the model and an ObjectController as per
the ember getting started guides...
Hacky fix to allow ValidatorViewSupport views to access the validator
hosted by an ObjectController.

I'm not sure if this approach is correct but it seems to make the example
work...
Merge branch 'feature/example-with-ember-data' of https://github.com/vitch/ember-validation
upgraded dependencies
added check for ObjectController